John Roy Porter

John Roy Porter

Professor, emeritus


  1. 2022
  2. Published

    Ten facts about land systems for sustainability

    Meyfroidt, P., de Bremond, A., Ryan, C. M., Archer, E., Aspinall, R., Chhabra, A., Camara, G., Corbera, E., DeFries, R., Díaz, S., Dong, J., Ellis, E. C., Erb, K. H., Fisher, J. A., Garrett, R. D., Golubiewski, N. E., Grau, H. R., Grove, J. M., Haberl, H., Heinimann, A. & 30 others, Hostert, P., Jobbágy, E. G., Kerr, S., Kuemmerle, T., Lambin, E. F., Lavorel, S., Lele, S., Mertz, Ole, Messerli, P., Metternicht, G., Munroe, D. K., Nagendra, H., Nielsen, J. Ø., Ojima, D. S., Parker, D. C., Pascual, U., Porter, John Roy, Ramankutty, N., Reenberg, A., Roy Chowdhury, R., Seto, K. C., Seufert, V., Shibata, H., Thomson, A., Turner, B. L., Urabe, J., Veldkamp, T., Verburg, P. H., Zeleke, G. & Zu Ermgassen, E. K. H. J., 2022, In: Proceedings of the National Academy of Sciences of the United States of America. 119, 7, 12 p., e2109217118.

    Research output: Contribution to journalJournal articlepeer-review

  3. 2021
  4. Published

    Klimakrisen kræver mere handling på den korte bane, Dan Jørgensen

    Gaarsmand Jacobsen, S., Lund, Jens Friis, Andersen, G., Jespersen, B., Porter, John Roy, Borregaard, Michael Krabbe, Richey, L. A. & Furu, Peter, 22 Feb 2021, Ræson.dk.

    Research output: Other contributionNet publication - Internet publicationCommunication

  5. Published

    Deconstructing agronomic resource use efficiencies to increase food production

    Porter, John Roy, Thorburn, P. J., Brown, H. E., Teixeira, E. I., Moot, D. J., Mills, A. & Christensen, Svend, 2021, In: Italian Journal of Agronomy. 16, 3, 6 p., 1694.

    Research output: Contribution to journalJournal articlepeer-review

  6. Published

    Evaluation of Sustainability of Irrigated Crops in Arid Regions, China

    Fan, F., Li, B., Zhang, W., Porter, John Roy & Zhang, F., 2021, In: Sustainability. 13, 1, 15 p., 342.

    Research output: Contribution to journalJournal articlepeer-review

  7. Published

    Vaccines, social measures and Covid19 - A European evidence-based analysis: Vaccines, social measures and Covid19

    Porter, John Roy, 2021, medRxiv, 12 p. (medRxiv).

    Research output: Working paperPreprintResearch

  8. 2020
  9. Published

    Making science more effective for agriculture

    Sadras, V., Alston, J., Aphalo, P., Connor, D., Denison, R. F., Fischer, T., Gray, R., Hayman, P., Kirkegaard, J., Kirchmann, H., Kropff, M., Lafitte, H. R., Langridge, P., Lenne, J., Mínguez, M. I., Passioura, J., Porter, J. R., Reeves, T., Rodriguez, D., Ryan, M. & 2 others, Villalobos, F. J. & Wood, D., 2020, Advances in Agronomy. Sparks, D. L. (ed.). Academic Press, p. 153-177 25 p. (Advances in Agronomy, Vol. 163).

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

  10. Published

    Opinion: Agriculture green development

    Porter, John Roy, 2020, In: Frontiers of Agricultural Science and Engineering. 7, 1, p. 117-119 3 p.

    Research output: Contribution to journalLetterpeer-review

  11. 2019
  12. Published

    Invited review: Intergovernmental Panel on Climate Change, agriculture, and food—A case of shifting cultivation and history

    Porter, John Roy, Challinor, A. J., Henriksen, Christian Bugge, Howden, S. M., Martre, P. & Smith, P., 1 Aug 2019, In: Global Change Biology. 25, 8, p. 2518-2529

    Research output: Contribution to journalReviewpeer-review

  13. Published

    Effects and relationships of grazing intensity on multiple ecosystem services in the Inner Mongolian steppe

    Fan, F., Liang, C., Tang, Y., Harker-Schuch, I. & Porter, John Roy, 20 Jul 2019, In: Science of the Total Environment. 675, p. 642-650

    Research output: Contribution to journalJournal articlepeer-review

  14. Published

    Global wheat production with 1.5 and 2.0°C above pre-industrial warming

    Liu, B., Martre, P., Ewert, F., Porter, J. R., Challinor, A. J., Müller, C., Ruane, A. C., Waha, K., Thorburn, P. J., Aggarwal, P. K., Ahmed, M., Balkovič, J., Basso, B., Biernath, C., Bindi, M., Cammarano, D., De Sanctis, G., Dumont, B., Espadafor, M., Eyshi Rezaei, E. & 37 others, Ferrise, R., Garcia-Vila, M., Gayler, S., Gao, Y., Horan, H., Hoogenboom, G., Izaurralde, R. C., Jones, C. D., Kassie, B. T., Kersebaum, K. C., Klein, C., Koehler, A., Maiorano, A., Minoli, S., Montesino San Martin, M., Naresh Kumar, S., Nendel, C., O'Leary, G. J., Palosuo, T., Priesack, E., Ripoche, D., Rötter, R. P., Semenov, M. A., Stöckle, C., Streck, T., Supit, I., Tao, F., Van der Velde, M., Wallach, D., Wang, E., Webber, H., Wolf, J., Xiao, L., Zhang, Z., Zhao, Z., Zhu, Y. & Asseng, S., Apr 2019, In: Global Change Biology. 25, 4, p. 1428-1444

    Research output: Contribution to journalJournal articlepeer-review

  15. Published

    Climate change impact and adaptation for wheat protein

    Asseng, S., Martre, P., Maiorano, A., Roetter, R. P., O'Leary, G. J., Fitzgerald, G. J., Girousse, C., Motzo, R., Giunta, F., Babar, M. A., Reynolds, M. P., Kheir, A. M. S., Thorburn, P. J., Waha, K., Ruane, A. C., Aggarwal, P. K., Ahmed, M., Balkovic, J., Basso, B., Biernath, C. & 47 others, Bindi, M., Cammarano, D., Challinor, A. J., De Sanctis, G., Dumont, B., Rezaei, E. E., Fereres, E., Ferrise, R., Garcia-Vila, M., Gayler, S., Gao, Y., Horan, H., Hoogenboom, G., Izaurralde, R. C., Jabloun, M., Jones, C. D., Kassie, B. T., Kersebaum, K., Klein, C., Koehler, A., Liu, B., Minoli, S., San Martin, M. M., Mueller, C., Kumar, S. N., Nendel, C., Olesen, J. E., Palosuo, T., Porter, John Roy, Priesack, E., Ripoche, D., Semenov, M. A., Stockle, C., Stratonovitch, P., Streck, T., Supit, I., Tao, F., Van der Velde, M., Wallach, D., Wang, E., Webber, H., Wolf, J., Xiao, L., Zhang, Z., Zhao, Z., Zhu, Y. & Ewert, F., 2019, In: Global Change Biology. 25, 1, p. 155-173

    Research output: Contribution to journalJournal articlepeer-review

  16. Published

    Implications of crop model ensemble size and composition for estimates of adaptation effects and agreement of recommendations

    Rodríguez, A., Ruiz-Ramos, M., Palosuo, T., Carter, T. R., Fronzek, S., Lorite, I. J., Ferrise, R., Pirttioja, N., Bindi, M., Baranowski, P., Buis, S., Cammarano, D., Chen, Y., Dumont, B., Ewert, F., Gaiser, T., Hlavinka, P., Hoffmann, H., Höhn, J. G., Jurecka, F. & 17 others, Kersebaum, K. C., Krzyszczak, J., Lana, M., Mechiche-Alami, A., Minet, J., Montesino, M., Nendel, C., Porter, John Roy, Ruget, F., Semenov, M. A., Steinmetz, Z., Stratonovitch, P., Supit, I., Tao, F., Trnka, M., de Wit, A. & Rötter, R. P., 2019, In: Agricultural and Forest Meteorology. 264, p. 351-362 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  17. 2018
  18. Published

    Long-term effects of conversion to organic farming on ecosystem services - a model simulation case study and on-farm case study in Denmark

    Fan, F., Henriksen, Christian Bugge & Porter, John Roy, 28 May 2018, In: Agroecology and Sustainable Food Systems. 42, 5, p. 504-529 26 p.

    Research output: Contribution to journalJournal articlepeer-review

  19. Published

    Adaptation response surfaces for managing wheat under perturbed climate and CO2 in a Mediterranean environment

    Ruiz-Ramos, M., Ferrise, R., Rodríguez, A., Lorite, I. J., Bindi, M., Carter, T. R., Fronzek, S., Palosuo, T., Pirttioja, N., Baranowski, P., Buis, S., Cammarano, D., Chen, Y., Dumont, B., Ewert, F., Gaiser, T., Hlavinka, P., Hoffmann, H., Höhn, J. G., Jurecka, F. & 17 others, Kersebaum, K. C., Krzyszczak, J., Lana, M., Mechiche-Alami, A., Minet, J., Montesino Pouzols, F., Nendel, C., Porter, John Roy, Ruget, F., Semenov, M. A., Steinmetz, Z., Stratonovitch, P., Supit, I., Tao, F., Trnka, M., de Wit, C. A. & Rötter, R. P., 2018, In: Agricultural Systems. 159, p. 260-274 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  20. Published

    Data requirements for crop modelling - applying the learning curve approach to the simulation of winter wheat flowering time under climate change

    Montesino San Martin, M., Wallach, D., Olesen, J. E., Challinor, A. J., Hoffman, M. P., Koehler, A. K., Roetter, R. P. & Porter, John Roy, 2018, In: European Journal of Agronomy. 95, p. 33-44 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  21. Published

    Relationship between stoichiometry and ecosystem services: a case study of organic farming systems

    Fan, F., Henriksen, Christian Bugge & Porter, John Roy, 2018, In: Ecological Indicators. 85, p. 400-408 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  22. Published

    Simulation of soil organic carbon effects on long-term winter wheat (Triticum aestivum) production under varying fertilizer inputs

    Ghaley, Bhim Bahadur, Wosten, H., Olesen, J. E., Schelde, K., Baby, S., Karki, Y. K., Borgesen, C. D., Smith, P., Yeluripati, J., Ferrise, R., Bindi, M., Kuikman, P., Lesschen, J. & Porter, John Roy, 2018, In: Frontiers in Plant Science. 9, p. 1-9 1158.

    Research output: Contribution to journalJournal articlepeer-review

  23. 2017
  24. Published

    Considering agriculture in IPCC assessments

    Porter, John Roy, Howden, M. & Smith, P., 2017, In: Nature Climate Change. 7, 10, p. 680-683 4 p.

    Research output: Contribution to journalComment/debatepeer-review

  25. Published

    Contribution of crop models to adaptation in wheat

    Chenu, K., Porter, John Roy, Martre, P., Basso, B., Chapman, S. C., Ewert, F., Bindi, M. & Asseng, S., 2017, In: Trends in Plant Science. 22, 6, p. 472-490 19 p.

    Research output: Contribution to journalReviewpeer-review

  26. Published

    Recasting economics as if the climate and global ecology really mattered

    Porter, John Roy, Howden, M., Smith, P. & Stokholm, M. S., 2017, In: Consilience: The Journal of Sustainable Development. 17, 1, p. 220-229 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  27. 2016
  28. Published

    Agricultural production and greenhouse gas emissions from world regions - the major trends over 40 years

    Bennetzen, E. H., Smith, P. & Porter, John Roy, 2016, In: Global Environmental Change. 37, p. 43-55 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  29. Published

    Decoupling of greenhouse gas emissions from global agricultural production: 1970-2050

    Bennetzen, E. H., Smith, P. & Porter, John Roy, 2016, In: Global Change Biology. 22, 2, p. 763-781 19 p.

    Research output: Contribution to journalJournal articlepeer-review

  30. Published

    Edited plants should not be patented: gene editing

    Porter, John Roy, Durand, J. & Elmayan, T., 2016, In: Nature. 530, 7588, p. 33 1 p.

    Research output: Contribution to journalComment/debatepeer-review

  31. Published

    Food and nutritional security requires adequate protein as well as energy, delivered from whole-year crop production

    Coles, G. D., Wratten, S. D. & Porter, John Roy, 2016, In: PeerJ. 4, 17 p., e2100.

    Research output: Contribution to journalJournal articlepeer-review

  32. Published

    Food, hunger, health, and climate change

    Woodward, A. & Porter, John Roy, 2016, In: The Lancet. 387, 10031, p. 1886-1887 2 p.

    Research output: Contribution to journalComment/debatepeer-review

  33. Published

    Review and analysis of vulnerability to rainfall variability and policy responses to agricultural water supply in Nigeria

    Olayide, O. E., Tetteh, I. K., Porter, John Roy & Popoola, L., 2016, In: Journal of Food, Agriculture and Environment. 14, 2, p. 152-155 4 p.

    Research output: Contribution to journalJournal articlepeer-review

  34. Published

    Valuation of ecosystem services in organic cereal crop production systems with different management practices in relation to organic matter input

    Fan, F., Henriksen, Christian Bugge & Porter, John Roy, 2016, In: Ecosystem Services. 22, Part A, p. 117-127 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  35. 2015
  36. Published

    Can crop-climate models be accurate and precise? A case study for wheat production in Denmark

    Montesino San Martin, M., Olesen, J. E. & Porter, John Roy, 2015, In: Agricultural and Forest Meteorology. 202, p. 51-60 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  37. Published

    Crop modelling for integrated assessment of risk to food production from climate change

    Ewert, F., Rötter, R. P., Bindi, M., Webber, H., Trnka, M., Kersebaum, K. C., Olesen, J. E., van Ittersum, M. K., Janssen, S., Rivington, M., Semenov, M. A., Wallach, D., Porter, J. R., Stewart, D., Verhagen, J., Gaiser, T., Palosuo, T., Tao, F., Nendel, C., Roggero, P. P. & 2 others, Bartosová, L. & Asseng, S., 2015, In: Environmental Modelling & Software. 72, p. 287-303 17 p.

    Research output: Contribution to journalJournal articlepeer-review

  38. Published

    Empirical modelling of regional and national durum wheat quality

    Toscano, P., Genesio, L., Crisci, A., Vaccari, F. P., Ferrari, E., La Cava, P., Porter, John Roy & Gioli, B., 2015, In: Agricultural and Forest Meteorology. 204, p. 67-78 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  39. Published

    Plant science and the food security agenda

    Ingram, J. S. I. & Porter, John Roy, 2015, In: Nature Plants. 1, 2 p., 15173.

    Research output: Contribution to journalComment/debate

  40. Published

    Relationship between C:N/C:O stoichiometry and ecosystem services in managed production systems

    Ghaley, Bhim Bahadur, Sandhu, H. S. & Porter, John Roy, 2015, In: P L o S One. 10, 4, 14 p., e0123869.

    Research output: Contribution to journalJournal articlepeer-review

  41. Published

    Significance and value of non.traded ecosystem services on farmland

    Sandhu, H., Wratten, S., Costanza, R., Pretty, J., Porter, John Roy & Reganold, J., 2015, In: PeerJ. 3, 22 p., e762.

    Research output: Contribution to journalJournal articlepeer-review

  42. 2014
  43. Published

    A genotype, environment and management (GxExM) analysis of adaptation in winter wheat to climate change in Denmark

    Montesino San Martin, M., Olesen, J. E. & Porter, John Roy, 2014, In: Agricultural and Forest Meteorology. 187, p. 1-13 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  44. Published

    Analyse af IPCC delrapport 2 - Effekter, klimatilpasning og sårbarhed: med særligt fokus på Danmark

    Christensen, J. H., Arnbjerg-Nielsen, K., Grinsted, Aslak, Halsnæs, K., Jeppesen, E., Madsen, H., Olesen, J. E., Porter, John Roy, Refsgaard, J. C. & Olesen, M., 2014, København: Miljøministeriet, Naturstyrelsen. 54 p.

    Research output: Book/ReportReport

  45. Published

    Conseil scientifique national de I'INRA: rapport de synthése du groupe de travail sur la propriété intellectuelle sur les connaissances dans le secteur végétal

    Barbier-Brygoo, H., Chilliard, Y., Durand, J., Elmayan, T., Goldringer, I. & Porter, John Roy, 2014, INRA. 64 p.

    Research output: Book/ReportReportpeer-review

  46. Published

    Determination of biomass accumulation in mixed belts of Salix, Corylus and Alnus species in combined food and energy production system

    Ghaley, Bhim Bahadur & Porter, John Roy, 2014, In: Biomass & Bioenergy. 63, p. 86-91 6 p.

    Research output: Contribution to journalJournal articlepeer-review

  47. Published

    Durum wheat quality prediction in Mediterranean environments: from local to regional scale

    Toscano, P., Gioli, B., Genesio, L., Vaccari, F. P., Miglietta, F., Zaldei, A., Crisci, A., Ferrari, E., Bertuzzi, F., La Cava, P., Ronchi, C., Silvestri, M., Peressotti, A. & Porter, John Roy, 2014, In: European Journal of Agronomy. 61, p. 1-9 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  48. Published

    Ecosystem function and service quantification and valuation in a conventional winter wheat production system with DAISY model in Denmark

    Ghaley, Bhim Bahadur & Porter, John Roy, 2014, In: Ecosystem Services. 10, p. 79-83 5 p.

    Research output: Contribution to journalJournal articlepeer-review

  49. Published

    Food security and food production systems

    Porter, John Roy, Xie, L., Challinor, A. J., Cochrane, K., Howden, S. M., Iqbal, M. M., Lobell, D. B. & Travasso, M. I., 2014, Climate Change 2014: Impacts, Adaptation, and Vulnerability. Cambridge University Press, p. 485-533 53 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

  50. Published

    Food security and food production systems

    Porter, John Roy, Xie, L., Challinor, A., Cochrane, K., Howden, M., Iqbal, M. M., Lobell, D. & Travasso, M. I., 2014, Fifth Assessment Report of the Intergovernmental Panel on Climate Change. p. 1-82 82 p.

    Research output: Chapter in Book/Report/Conference proceedingReport chapterResearchpeer-review

  51. Published

    Move on to a carbon currency standard

    Porter, John Roy & Wratten, S., 2014, In: Nature Study. 506, p. 295 1 p.

    Research output: Contribution to journalComment/debatepeer-review

  52. Published

    Quantification and valuation of ecosystem services in diverse production systems for informed decision-making

    Ghaley, Bhim Bahadur, Vesterdal, Lars & Porter, John Roy, 2014, In: Environmental Science & Policy. 39, p. 139-149 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  53. Published

    Soil-based ecosystem services: a synthesis of nutrient cycling and carbon sequestration assessment methods

    Ghaley, Bhim Bahadur, Porter, John Roy & Sandhu, H. S., 2014, In: The International Journal of Biodiversity Science, Ecosystems Services & Management. 10, 3, p. 177-186 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  54. Published

    Summary for policymakers

    Field, C. B., Barros, V. R., Mastrandrea, M. D. & Porter, John Roy, 2014, Climate change 2014: impacts, adaptation and vulnerability. . Vol. Part A. p. 1-32 32 p.

    Research output: Chapter in Book/Report/Conference proceedingReport chapterResearchpeer-review

  55. Published

    Temperatures and the growth and development of maize and rice: a review

    Sánchez, B., Rasmussen, A. & Porter, John Roy, 2014, In: Global Change Biology. 20, 2, p. 408-417 10 p.

    Research output: Contribution to journalReviewpeer-review

  56. 2013
  57. Published

    Deconstructing crop processes and models via identities

    Porter, John Roy & Christensen, Svend, 2013, In: Plant, Cell and Environment. 36, 11, p. 1919-1925 7 p.

    Research output: Contribution to journalJournal articlepeer-review

  58. Published

    Emergy synthesis of a combined food and energy production system compared to a conventional wheat (Triticum aestivum) production system

    Ghaley, Bhim Bahadur & Porter, John Roy, 2013, In: Ecological Indicators. 24, p. 534-542 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  59. Published

    Experimental assessment of ecosystem services in agriculture

    Sandhu, H., Porter, John Roy & Wratten, S., 2013, Ecosystem services in agricultural and urban landscapes. Wratten, S., Sandhu, H., Cullen, R. & Costanza, R. (eds.). Wiley-Blackwell, p. 122-135 14 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

  60. Published

    Soil temperature manipulation to study global warming effects in arable land: performance of buried heating-cable method

    Patil, R. H., Laegdsmand, M., Olesen, J. E. & Porter, John Roy, 2013, In: Environment and Ecology Research. 1, 4, p. 196-204 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  61. Published

    The role of uncertainty in climate change adaptation strategies - a Danish water management example

    Refsgaard, J. C., Arnbjerg-Nielsen, K., Drews, M., Halsnæs, K., Jeppesen, E., Madsen, H., Markandya, A., Olesen, J. E., Porter, John Roy & Christensen, J. H., 2013, In: Mitigation and Adaptation Strategies for Global Change. 18, 3, p. 337-359 23 p.

    Research output: Contribution to journalJournal articlepeer-review

  62. 2012
  63. Published

    A European science plan to sustainably increase food security under climate change

    Soussana, J., Fereres, E., Long, S. P., Mohren, F. G. M. J., Pandya-Lorch, R., Peltonen-Sainio, P., Porter, John Roy, Rosswall, T. & von Braun, J., 2012, In: Global Change Biology. 18, 11, p. 3269-3271 3 p.

    Research output: Contribution to journalLetterpeer-review

  64. Published

    Assessing models for parameters of the Ångström-Prescott formula in China

    Liu, X., Xu, Y., Zhong, X., Zhang, W., Porter, John Roy & Liu, W., 2012, In: Applied Energy. 96, p. 327-338 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  65. Published

    Durum wheat modeling: The Delphi system, 11 years of observations in Italy

    Toscano, P., Ranieri, R., Matese, A., Vaccari, F. P., Gioli, B., Zaldei, A., Silvestri, M., Ronchi, C., La Cava, P., Porter, John Roy & Miglietta, F., 2012, In: European Journal of Agronomy. 43, p. 108-118 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  66. Published

    Identity-based estimation of greenhouse gas emissions from crop production: case study from Denmark

    Bennetzen, E. H., Smith, P., Soussana, J. & Porter, John Roy, 2012, In: European Journal of Agronomy. 41, p. 66-72 7 p.

    Research output: Contribution to journalJournal articlepeer-review

  67. Published

    Root carbon input in organic and inorganic fertilizer-based systems

    Chirinda, N., Olesen, J. E. & Porter, John Roy, 2012, In: Plant and Soil. 359, 1-2, p. 321-333 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  68. Published

    Sensitivity of crop yield and N losses in winter wheat to changes in mean and variability of temperature and precipitation in Denmark using the FASSET model

    Patil, R. H., Lægdsmand, M., Olesen, J. E. & Porter, John Roy, 2012, In: Acta Agriculturae Scandinavica. Section B. Soil and Plant Science. 62, 4, p. 335-351 17 p.

    Research output: Contribution to journalJournal articlepeer-review

  69. 2011
  70. Published

    Vi skal brødføde ni milliarder

    Porter, John Roy, Streibig, Jens Carl & Weiner, Jacob, 1 Sep 2011, In: Weekendavisen Berlingske. p. 11 1 p.

    Research output: Contribution to journalContribution to newspaper - Newspaper article

  71. Published

    Agronomy as the science of sustainable food production

    Porter, John Roy, 2011, Climate change: challenges and opportunities in agriculture. AGRISAFE, p. 12-15 4 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  72. Published

    Crop-climate models need an overhaul

    Rötter, R. P., Carter, T. R., Olesen, J. E. & Porter, John Roy, 2011, In: Nature. 1, p. 175-177 3 p.

    Research output: Contribution to journalLetterpeer-review

  73. Published

    Emergy signature as a basis for sustainability valuation of agro-ecosystems

    Ghaley, Bhim Bahadur, Montesino San Martin, M. & Porter, John Roy, 2011. 1 p.

    Research output: Contribution to conferencePosterResearch

  74. Published

    How will growing cities eat?

    Porter, John Roy, Deutsch, L., Dumaresq, D. & Dyball, R., 2011, In: Nature. 469, p. 34 1 p.

    Research output: Contribution to journalComment/debatepeer-review

  75. Published

    Obituary: E.J.M. Kirby

    Hay, R. K. M. & Porter, John Roy, 2011, In: Journal of Agricultural Science. 149, 4, p. 401 1 p.

    Research output: Contribution to journalJournal articlepeer-review

  76. Published

    Position statement on climate change

    Boote, K. J., Brouder, S. M., Clay, D., Gepts, P., Hatfield, J. L., Hillel, D., Izaurralde, R. C., Mosier, A. R., Porter, John Roy, Rosenzweig, C. E., Rice, C. W. & Climate Change Working Group, C. C. W. G., 2011, American Society of Agronomy. 12 p.

    Research output: Book/ReportBookpeer-review

  77. Published

    Post-cold-storage conditioning time affects soil denitrifying enzyme activity

    Chirinda, N., Olesen, J. E. & Porter, John Roy, 2011, In: Communications in Soil Science and Plant Analysis. 42, 17, p. 2160-2167 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  78. Published

    Simulating soil N2O emissions and heterotrophic CO2 respiration in arabe systems using FASSET and MoBiLE-DNDC

    Chirinda, N., Kracher, D., Lægdsmand, M., Porter, John Roy, Olesen, J. E., Petersen, B. M., Doltra, J., Kiese, R. & Butterbach-Bahl, K., 2011, In: Plant and Soil. 343, 1-2, p. 139-160 22 p.

    Research output: Contribution to journalJournal articlepeer-review

  79. 2010
  80. Published

    Agronomy as the science of primary food production

    Porter, John Roy, 2010, Proceedings of Agro2010 the XIth ESA Congress: 2010, Montpellier, France. p. 41-42 2 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

  81. Published

    Choice of the Ångström-Prescott coefficients: are time-dependent ones better than fixed ones in modelling globat solar irradiance?

    Liu, X., Mei, X., Li, Y., Porter, John Roy, Wang, Q. & Zhang, Y., 2010, In: Energy Conversion and Management. 51, 12, p. 2565-2574 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  82. Published

    Climate Change and Agriculture: The heart of a perfect storm

    Porter, John Roy, 2010, Abstracts of Papers. International Institute for Bet Research, p. 2-3

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearchpeer-review

  83. Published

    Det europæiske fødevaresystem og fremtidens scenarier for landbrug

    Porter, John Roy, Porter, H. R. B. & Olesen, J. E., 2010, In: Geografisk Orientering. 2

    Research output: Contribution to journalJournal article

  84. Published

    Effect of soil warming and rainfall patterns on soil N cycling in northern Europe

    Patil, R. H., Lægdsmand, M., Olesen, J. E. & Porter, John Roy, 2010, In: Agriculture, Ecosystems & Environment. 139, 1-2, p. 195-205 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  85. Published

    Emissions of nitrous oxide from arable organic and conventional cropping systems on two soil types

    Chirinda, N., Carter, M. S., Albert, K. R., Ambus, Per Lennart, Olesen, J. E., Porter, John Roy & Petersen, S. O., 2010, In: Agriculture, Ecosystems & Environment. 136, 3-4, p. 199-208 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  86. Published

    Feedings Capitals: Security and Sovereignty of Food and Land in Canberra, Copenhagen and Tokyo

    Porter, John Roy, 2010, Green Revolution 2.0: Food+Energy and Environmental Security: Session 52: Symposium--Global Food Security in a Changing Climate. American Society of Agronomy, p. s. 71

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

  87. Published

    Food security: focus on agriculture

    Porter, John Roy, Challinor, A., Ewert, F., Falloon, P., Fischer, T., Gregory, P., Van Ittersum, M. K., Olesen, J. E., Moore, K. J., Rosensweig, C. & Smith, P., 2010, In: Science. 328, p. 172 1 p.

    Research output: Contribution to journalLetterpeer-review

  88. Published

    Globalt læringsmiljø om et globalt problem: en beskrivelse af et tværvidenskabeligt online kursus om klimaforandringer

    Henriksen, Christian Bugge, Monty, A. & Porter, John Roy, 2010, In: Tidsskriftet Læring og Medier (LOM). 6, p. 1-21 21 p.

    Research output: Contribution to journalJournal articlepeer-review

  89. Published

    Growth and yield response of winter wheat to soil warming and rainfall patterns

    Patil, R. H., Lægdsmand, M., Olesen, J. E. & Porter, John Roy, 2010, In: Journal of Agricultural Science. 148, 5, p. 553-566 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  90. Published

    Læbælter til energi og marker til fødevareproduktion

    Porter, John Roy, Sigsgaard, L, Sandhu, H. S., Wratten, S. D., Costanza, R. & Dennis, B., 2010, In: Jord og Viden. 155, 5, p. 18-19

    Research output: Contribution to journalJournal article

  91. Published

    Security and sovereignty of food and land in Camberra, Copenhagen and Tokoy

    Porter, John Roy, Deutsch, L., Dumaresq, D., Dyball, R. A. & Kazuhiko, T., 2010, The Ecological Society of America95th Annual Meeting,.

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearch

  92. Published

    Soil properties, crop production and greenhouse gas emissions from organic and inorganic fertilizer-based arable cropping systems

    Chirinda, N., Olesen, J. E., Porter, John Roy & Schjønning, P., 2010, In: Agriculture, Ecosystems & Environment. 139, 4, p. 584-594 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  93. Published

    The Rubisco enzyme and agricultural productivity

    Porter, John Roy & Wollenweber, B., 2010, In: Nature Correspondence. 463, 7283, p. 876 1 p.

    Research output: Contribution to journalComment/debatepeer-review

  94. 2009
  95. Published

    Agriculture and technology

    Porter, John Roy & Rasmussen, Jesper, 2009, A companion to the philosophy of technology. Olsen, J. K. B., Pedersen, S. A. & Hendricks, V. F. (eds.). Wiley-Blackwell, p. 285-288 4 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  96. Published

    Biomass for biofuels - the challenge and a possible way forward

    Felby, C., Porter, John Roy, Rasmussen, Søren Kjærsgaard, Schjoerring, Jan K., Nielsen, T. H., Sakuragi, Y. & Willats, W. G. T., 2009. 1 p.

    Research output: Contribution to conferenceConference abstract for conferenceResearch

  97. Published

    Calibration of the Ångström-Prescott coefficients (a, b) under different time scales and their impacts in estimating global solar radiation in the Yellow River basin

    Liu, X., Mei, X., Li, Y., Zhng, Y., Wang, Q., Jensen, J. R. & Porter, John Roy, 2009, In: Agricultural and Forest Meteorology. 149, 3-4, p. 697-710 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  98. Published

    Chemical stress can increase crop yield

    Cedergreen, Nina, Felby, C., Porter, John Roy & Streibig, Jens Carl, 2009, In: Field Crops Research. 114, 1, p. 54-57 4 p.

    Research output: Contribution to journalJournal articlepeer-review

  99. Published

    E-learning, climate change and carbon footprints

    Henriksen, Christian Bugge, Monty, A. & Porter, John Roy, 2009, In: Institute of Physics Conference Series. 1 p.

    Research output: Contribution to journalConference abstract in journal

  100. Published

    Evaluation of temperature-based global solar radiation models in China

    Liu, X., Mei, X., Li, Y., Wang, Q., Jensen, J. R., Zhang, Y. & Porter, John Roy, 2009, In: Agricultural and Forest Meteorology. 149, 9, p. 1433-1446 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  101. Published

    The Copenhagen Climate Congress - future agricultural production and climate change

    Porter, John Roy, 2009, In: FNAT. 4, p. 10-11 2 p.

    Research output: Contribution to journalJournal article

  102. Published

    The value of producing food, energy, and ecosystem services within an agro-ecosystem

    Porter, John Roy, Constanza, R., Sandhu, H., Sigsgaard, L & Wratten, S., 2009, In: Ambio. 38, 4, p. 186-193 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  103. Published

    Variation in reference crop evapotranspiration caused by the Ångström-Prescott coefficient: locally calibrated versus the FAO recommended

    Liu, X., Mei, X., Li, Y., Wang, Q., Zhang, Y. & Porter, John Roy, 2009, In: Agricultural Water Management. 96, 7, p. 1137-1145 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  104. 2008
  105. Published

    Ecosystem services from agriculture

    Porter, John Roy & Sigsgaard, L, Apr 2008, Ecosystem Services and Drivers of Biodiversity Change. Report of the RUBICODE electronic conference. Grant, F., Harrison, J., Sykes, P., Skourtos, M., Rounsevell, M., Kluvánková-Oravská, T., Settele, J., Musche, M., Anton, C. & Watt, A. (eds.). p. 33 1 p.

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearch

  106. Published

    Biofuels: putting current practices in perspective

    Porter, John Roy, Chirinda, N., Felby, C. & Olesen, J. E., 2008, In: Science. 320, 5882, p. 1420-1420 1 p.

    Research output: Contribution to journalComment/debate

  107. Published

    En global kulstofbank mod CO2-udslip

    Porter, John Roy & Streibig, Jens Carl, 2008, In: Berlingske Tidende. p. 23 1 p.

    Research output: Contribution to journalContribution to newspaper - Feature article

  108. Published

    The new pest risk analysis for Tilletia indica, the cause of karnal bunt of wheat, continues to support the quarantine status of the pathogen in Europe

    Sansford, C. E., Baker, R. H. A., Brennan, J. P., Ewert, F., Gioli, B., Inman, A., Kinsella, A., Magnus, H. A., Miglietta, F., Murray, G. M., Porta-Puglia, A., Porter, John Roy, Rafoss, T., Riccioni, L. & Thorne, F., 2008, In: Plant Pathology. 57, 4, p. 603-611 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  109. 2007
  110. Published

    We must know what is green before we tax

    Porter, John Roy, Bindi, M., Olesen, J. E. & Smith, P., 13 Nov 2007, In: Times Online. 1 p.

    Research output: Contribution to journalContribution to newspaper - Newspaper article

  111. Published

    Afgrødernes respons på klimaændringer

    Porter, John Roy, 2007. 2 p.

    Research output: Contribution to conferencePaperResearch

  112. Published

    Bioethanol i tanken udelukker ikke mad i maven

    Felby, C., Streibig, Jens Carl & Porter, John Roy, 2007, In: Dagbladet Information. 2 p.

    Research output: Contribution to journalContribution to newspaper - Newspaper article

  113. Published

    Choosing crops as energy feedstocks

    Porter, John Roy, Kirsch, M. M. N., Streibig, Jens Carl & Felby, C., 2007, In: Nature Biotechnology. 25, 7, p. 716-717 1 p.

    Research output: Contribution to journalLetterpeer-review

  114. Published

    Crop models, CO2, and Climate Change

    Ewert, F., Porter, John Roy & Rounsevell, M. D. A., 2007, In: Science. 315, 5811, p. 459 1 p.

    Research output: Contribution to journalLetterpeer-review

  115. Published

    Impacts of Climate Change on renewable Energy Sources and their Role in Nordic and Baltic Energy Systems: Case of Bio-Fuels: Research Notes

    Venäkäinen, A., Kellomäki, S., Sigurdsson, B., Linder, S., Porter, John Roy & Kull, O., 2007, University of Joensuu, Faculty of Forestry. 86 p.

    Research output: Book/ReportBook

  116. Published

    In memoriam Dr. P.H. (Pieter) Vereijken

    Porter, John Roy (ed.) & Spiertz, H., 2007, In: European Journal of Agronomy. 27, 2-4, p. iii-iv 2 p.

    Research output: Contribution to journalJournal article

  117. Published

    Reconciling alternative models of phenological development in winter wheat

    Jamieson, P. D., Brooking, I. R., Semenov, M. A., McMaster, G. S., White, J. W. & Porter, John Roy, 2007, In: Field Crops Research. 103, 1, p. 36-41 6 p.

    Research output: Contribution to journalJournal articlepeer-review

  118. Published

    The value of producing food, energy and ecosystem services within an agro-ecosystem

    Porter, John Roy, Costanza, R., Sigsgaard, L, Sandhu, H. S. & Wratten, S. D., 2007, Nature Precedings, 27 p.

    Research output: Working paperResearch

  119. Published

    Wheat production systems and global climate change: chapter 16

    Porter, John Roy, Jamieson, P. D. & Grace, P. R., 2007, Terrestrial ecosystems in a changing world. Canadell, J. G., Pataki, D. & Pitelka, L. (eds.). Berlin: Kluwer Academic Publishers, p. 195-209 15 p. (Global Change - The IGBP Series).

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  120. 2006
  121. Published

    Agroecology education and research: an academic platform for organic farming

    Francis, C., Breland, T. A., Lieblein, G., Moulton, M., Salomonsen, L., Geber, U., Langer, Vibeke, Sriskandarajah, N., Porter, John Roy & Helenius, J., 2006, Ikke angivet. Andreasen, C. B., Elsgaard, L., Søndergaard Sørensen, L. & Hansen, G. (eds.). Forskningscenter for Økologisk Jordbrug og Fødevaresystemer, 2 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  122. Published

    Creating a Nordic regional research network in agroecology: links to MSc education

    Francis, C., Breland, T. A., Lieblein, G., Salomonsen, L., Geber, U., Sriskandarajah, N., Langer, Vibeke, Porter, John Roy & Helenius, J., 2006, Changing European farming systems for a better future: New visions for rural areas. Langeveld, H. & Röling, N. (eds.). Wageningen Academic Publishers, p. 320-324 5 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  123. Published

    En anden slags grøn revolution venter

    Felby, C., Streibig, Jens Carl & Porter, John Roy, 2006, In: Morgenavisen Jyllands-Posten. 136, 20, 1 p.

    Research output: Contribution to journalContribution to newspaper - Newspaper article

  124. Published

    Modelling protein content and composition in relation to crop nitrogen dynamics for wheat

    Martre, P., Jamieson, P. D., Semenov, M. A., Zyskowski, R. F., Porter, John Roy & Triboi, E., 2006, In: European Journal of Agronomy. 25, 2, p. 138-154 17 p.

    Research output: Contribution to journalJournal articlepeer-review

  125. Published

    Modelling protein content and composition in wheat

    Jamieson, P., Martre, P., Samoli, V., Porter, John Roy, Zyskowski, R. F., Semenov, M. & Triboi, E., 2006. 1 p.

    Research output: Contribution to conferencePosterResearch

  126. Published

    Potential impacts of climate change on production of biofuels in agriculture the Nordic and Baltic Region

    Porter, John Roy, 2006, Impacts of climate change on renewable energy sources and their role in the Nordic energy system: case of bio-fuels. Kellomäki, S. & Leinonen, S. (eds.). Joensuu, Finland: University of Joensuu, Faculty of Forestry, p. 38-49 12 p. (Research Notes / University of Joensuu, Faculty of Forestry; No. 170).

    Research output: Chapter in Book/Report/Conference proceedingReport chapterResearch

  127. Published

    Risks associated with Tilletia indica, the newly-listed EU quarantine pathogen, the cause of Karnal bunt of wheat: EC 5. framework project QLK5-1999-01554

    Sansford, C., Murray, G., Brennan, J., Leth, V., Porter, John Roy, Kelly, P., Miglietta, F., Riccioni, L., Magnus, H. & Petrson, G., 2006, EC. 164 p. (Deliverable Report DL 6.1). (Deliverable Report 6.5).

    Research output: Book/ReportReport

  128. Published

    The physiology of crop yield

    Hay, R. K. M. & Porter, John Roy, 2006, 2. udg. ed. Oxford: Blackwell Publishing. 309 p.

    Research output: Book/ReportReport

  129. 2005
  130. Published

    Agroecology: a flagship NOVA program

    Lieblein, G., Bretland, T. A., Francis, C. A., Sriskandarajah, N., Langer, Vibeke, Porter, John Roy, Salomonsen, L., Gerber, U. & Helenius, J., 2005, 10 NOVA University Network Years. The Nordic Forestry, Veterinary and Agricultural University Network, p. 52-53 2 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterCommunication

  131. Published

    Combining af disease model with a crop phenology model to assess and map pest risk; Karnal bunt disease (Tilletia indica) of wheat in Europe

    Baker, R. H. A., Sansford, C. E., Gioli, B., Miglietta, F., Porter, John Roy & Ewert, F., 2005, Ikke angivet. Christian Ejlers, 6 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  132. Published

    Crop responses to climatic variation: Papers of a Discussion Meeting held at The Royal Society on 26 and 27 April 2005 Food crops an a changing climate

    Porter, John Roy & Semenov, M. A., 2005, In: Philosophical Transactions of the Royal Society of London. Biological Sciences. 360, 1463, p. 2021-2035 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  133. Published

    GLP (2005) Science Plan and Implementation Strategy. IGPB Report No. 53/IHDP Report No. 19

    Moran, E., Ojima, D., Buchmann, N., Canadell, J., Graumlich, L., Jackson, R., Jaramillo, V., Lavorel, S., Leadly, P., Matson, P., Murdiyarso, D., Porter, John Roy, Pfaff, A., Pitelka, L., Rajan, K., Ramankutty, N., Turner, B. & Yagi, K., 2005, Stockholm: EGBP Secretariat. 64 p.

    Research output: Book/ReportReport

  134. Published

    Need for multidisciplinary research towards a second green revolution: commentary

    Wollenweber, B., Porter, John Roy & Lübberstedt, T., 2005, In: Current Opinion in Plant Biology. 8, 3, p. 337-341 5 p.

    Research output: Contribution to journalJournal articlepeer-review

  135. Published

    Rising temperatures are likely to reduce crop yields: correspondence

    Porter, John Roy, 2005

    Research output: Other contributionCommunication

  136. 2004
  137. Published

    Effects of water deficits and high temperature-events in wheat

    Wollenweber, B., Porter, John Roy, Jensen, C. R. & Schellberg, J., 2004, Ikke angivet. Sven-Erik Jacobsen, C. R. J. J. R. P. (ed.). Samfundslitteratur, p. 195-196 2 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  138. Published

    Modelling the responses of grain protein and composition to environmental variations

    Martre, P., Triboï, E., Jamieson, P. D. & Porter, John Roy, 2004. 1 p.

    Research output: Contribution to conferencePaperResearch

  139. Published

    VIII ESA Congress: book of proceedings

    Jacobsen, S., Jensen, C. R. & Porter, John Roy, 2004, Copenhagen: Center for Skov, Landskab og Planlægning/Københavns Universitet. 968 p.

    Research output: Book/ReportBook

  140. 2003
  141. Published

    A dynamic Model of the Effects of nitrogen Fertilisation, Water Deficit and Temperature on grain protein level and composition for Bread Wheat (Triticum Aestivum L.)

    Martre, P., Porter, John Roy, Jamieson, P., Henton, S. M. & Triboï, E., 2003. 4 p.

    Research output: Contribution to conferencePaperResearch

  142. Published

    Agroecology, scaling and interdisciplinarity

    Porter, John Roy, Dalgaard, T. & Hutchings, N. J., 2003, In: Agriculture Acosystems & Environment. 100, 1, p. 39-51 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  143. Published

    Food and fibre

    Porter, John Roy, Green, K., Ingram, J. & Jaeger, J., 2003, In: Global Problems - Global Science - Europes contribution to global change research. ESF forward Look Report. 1, p. 45-56 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  144. Published

    Lack of Interaction between Extreme High-Temperature Events at Vegetative and Reproductive Growth Stages in Wheat

    Wollenweber, B., Porter, John Roy & Schellberg, J., 2003, In: Journal of Agronomy and Crop Science. 189, 3, p. 142-150 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  145. Published

    Lack of interaktion between extreme high-temperature events at vegetative and reproductive growtg stages in wheat

    Wollenweber, B., Porter, John Roy & Schellberg, J., 2003, In: Journal of Agronomy and Crop Science. 189, p. 142-150 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  146. Published

    Modeling Grain Nitrogen Accumulation and Protein Composition to Understand the Sink/Source Regulation of Nitrogen Romobilisation for Wheat

    Martre, P., Porter, John Roy, Jamieson, P. & Triboï, E., 2003, In: Plant Physiology. 133, p. 1959-1967 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  147. Published

    Spring Wheat Leaf Appearance and Temperature: Extending the Paradigm?

    MCMaster, G. S., Wilhelm, W. W., Palic, D. B. & Porter, John Roy, 2003, In: Annals of Botany. 91, 6, p. 697-705 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  148. 2002
  149. Published

    Distribution of assimilated carbon in plants and rhizosphere soil of basket willow (Salix viminalis L.)

    de Neergaard, T. A. F., Porter, John Roy & Gorissen, A., 2002, In: Plant and Soil. 245, 2, p. 307-314 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  150. Published

    Effects of elevated CO/sub 2/ and drought on wheat: testing crop simulation models for different experimental and climatic conditions

    Ewert, F., Rodriguez, D., Jamieson, P., Semenov, M. A., Mitchell, R. A. C., Goudriaan, J., Porter, John Roy, Kimball, B. A., Pinter, P. J., Manderscheid, R., Weigel, H. J., Fangmeier, A., Fereres, E. & Villalobos, F., 2002, In: Agriculture, Ecosystems & Environment. 93, p. 249-266 18 p.

    Research output: Contribution to journalJournal articlepeer-review

  151. Published

    Effects of windbreak strips of willow coppice: modelling and field experiment on barley in Denmark

    Foereid, B., Bro, Rasmus, Mogensen, V. O. & Porter, John Roy, 2002, In: Agriculture, Ecosystems & Environment. 93, 1-3, p. 25-32 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  152. Published

    Future contributions of crop modelling-from heuristics and supporting decision making to understanding genetic regulation and aiding crop improvement

    Hammer, G. L., Kropff, M. J., Sinclair, T. R. & Porter, John Roy, 2002, In: European Journal of Agronomy. 18, p. 15-31 17 p.

    Research output: Contribution to journalJournal articlepeer-review

  153. Published

    Modelling cropping systems- highlights of the symposium and preface to the special issues

    Hammer, G. L., Kropff, M. J., Sinclair, T. R. & Porter, John Roy, 2002, In: European Journal of Agronomy. 16, p. 1-11 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  154. Published

    Predicting potential distribution of karnal bunt (Tilletia indica) of wheat

    Ewert, F., Baker, R., Porter, John Roy, Gioli, B., Miglietta, F. & Sansford, C., 2002. 2 p.

    Research output: Contribution to conferencePaperResearch

  155. 2001
  156. Published

    A model for fossil energy use in Danish agriculture used to compare organic and conventional farming

    Dalgaard, T., Halberg, N. & Porter, John Roy, 2001, In: Agriculture, Ecosystems & Environment. 87, p. 51-65 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  157. Published

    Challenges in designing ecological agriculture education: a Nordic perspective on change

    Francis, C. A., Lieblein, G., Helenius, J., Salomonsson, L., Olsen, H. & Porter, John Roy, 2001, In: Renewable Agriculture and Food Systems (Print Edition). 16, 2, p. 89-95 7 p.

    Research output: Contribution to journalJournal articlepeer-review

  158. Published
  159. Published

    Organic movement reveals a shift in the social position of science

    Mørkeberg, A. & Porter, John Roy, 2001, In: Nature. 412

    Research output: Contribution to journalJournal articlepeer-review

  160. Published

    The ¤use of phenological data and models in a pest risk analyses for karnal bunt (Tilletia indica) in wheat across Europe

    Ewert, F., Porter, John Roy, Miglietta, F., Gioli, B., Baker, R. & Sansford, C., 2001, The ¤times they are changing : book of abstratcs. p. 15 1 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  161. 2000
  162. Published

    Conceptual foundation for innovative education in agroecology

    Francis, C., Helenius, J., Lieblein, G., Porter, John Roy, Olsen, H. & Salomonsson, L., 2000, Integrating concepts of sustainability into education for agriculture and rural development. Bor, W. V. D., Holen, P., Wals, A. & Filho, W. L. (eds.). Frankfurt am Main: Peter Lang, Vol. 6. p. 125-137 13 p. (Environmental education, communication and sustainability).

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  163. Published

    Effects of high temperature extremes on wheat

    Ferris, R., Wheeler, T. R., Ellis, R. H., Hadley, P., Wollenweber, B., Porter, John Roy, Karacostas, T. S., Papadopoulos, M. N. & Schellberg, J., 2000, Climate change, climatic variability and agriculture in Europe : an integrated assessment. Downing, T. E., Harrison, P. A., Butterfield, R. E. & Lonsdale, K. G. (eds.). p. 31-55 25 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  164. Published

    Effects of water deficits and high temperature-events in wheat

    Wollenweber, B., Jensen, C. R., Schellberg, J. & Porter, John Roy, 2000. 1 p.

    Research output: Contribution to conferencePaperResearch

  165. Published

    Future education in ecological agriculture and food systems: a student-faculty evaluation and planning process

    Lieblein, G., Francis, C., Barth-Eide, W., Torjusen, H., Solberg, S., Salomonsson, L. V., Ekblad, G., Persson, P., Helenius, J., Loiva, M., Seppänen, L., Kahiluoto, H., Porter, John Roy, Olsen, H., Sriskandarajah, N., Mikk, M. & Flora, C., 2000, In: Journal of Sustainable Agriculture. 16, 4, p. 49-69 21 p.

    Research output: Contribution to journalJournal articlepeer-review

  166. Published

    Modelling CO2 effects on wheat with varying nitrogen supplies

    Jamieson, P., Berntsen, J., Ewert, F., Kimball, B. A., Olesen, J. E., Pinter, P. J., Porter, John Roy & Semenov, M., 2000, In: Agriculture, Ecosystems & Environment. 82, p. 27-37 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  167. Published

    Modelling CO2 effects on wheat with varying water supply

    Ewert, F., Rodriguez, D., Mitchell, R. A. C., Semenov, M., Porter, John Roy, Goudriaan, J., Jamieson, P., Kimball, B. A., Manderscheid, R., Fangmeier, A. & Fereres, E., 2000. 1 p.

    Research output: Contribution to conferencePaperResearch

  168. Published

    Modelling and experimental studies of the growth and development of wheat

    Porter, John Roy, 2000, Copenhagen: The Royal Veterinary and Agricultural University, Department of Dairy and Food Science, Agroecology Group. 99 p.

    Research output: Book/ReportPh.D. thesis

  169. Published

    Modelling the effects of Co2 and drought on wheat for different climatic conditions and cultivars

    Ewert, F., Rodriguez, D., Jamieson, P., Semenov, M. A., Mitchell, R. A. C., Goudriaan, J., Porter, John Roy, Manderscheid, R., Weigel, H. J., Fangmeier, A., Fereres, E. & Villalobos, F., 2000, Improving wheat model accuracy and suitability for regional impact assessment 1998-2000 : IMPETUS final report: EC project ENV4-CT97-0496. p. 108-136 29 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  170. Published

    Ozone effects on wheat in relation to CO2: modelling short-term and long-term responses of leaf photosynthesis and leaf duration

    Ewert, F. & Porter, John Roy, 2000, In: Global Change Biology. 6, p. 735-750 16 p.

    Research output: Contribution to journalJournal articlepeer-review

  171. Published

    Ozone effects on wheat in response to climatic variation and CO2

    Ewert, F., Oijen, M. V. & Porter, John Roy, 2000. 1 p.

    Research output: Contribution to conferencePaperResearch

  172. Published

    Patent confusion in law on new plant varieties

    Porter, John Roy, 2000

    Research output: Other contributionCommunication

  173. Published

    Quantification of uncertainty in climate change impact assessment

    Downing, T. E., Barrow, E. M., Brooks, R. J., Butterfield, R. E., Carter, T. R., Harrison, P. A., Hulme, M., Olesen, J. E., Porter, John Roy, Schellberg, J., Semenov, M. A., Vinther, F. P., Wheeler, T. R. & Wolf, J., 2000, Climate change, climatic variability and agriculture in Europe : an integrated assessment. Downing, T. E., Harrison, P. A., Butterfield, R. E. & Lonsdale, K. G. (eds.). p. 415-434 20 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  174. Published

    Scaling-up AFRCWHEAT2 model to assess phenological development for wheat in Europe

    Harrison, P. A., Porter, John Roy & Downing, T. E., 2000, In: Agricultural and Forest Meteorology. 101, p. 167-186 20 p.

    Research output: Contribution to journalJournal articlepeer-review

  175. Published

    Sustainability and biological interactions in a combined food and energy cropping system

    Neergaard, A. D., Langer, Vibeke, Kuemmel, B., Føreid, B. & Porter, John Roy, 2000. 1 p.

    Research output: Contribution to conferencePaperResearch

  176. Published

    Temperature variability and the yield of annual crops

    Wheeler, T. R., Craufurd, P. Q., Ellis, R. H., Porter, John Roy & Prasad, P. V. V., 2000, In: Agriculture, Ecosystems & Environment. 82, p. 159-167 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  177. Published

    Verdens bønder - fremtidens helte

    Olofsdotter, M. & Porter, John Roy, 2000, In: Morgenavisen Jyllands-Posten. 21, 1 p.

    Research output: Contribution to journalJournal article

  178. 1999
  179. Published

    Climate variability and crop yields in Europe

    Porter, John Roy & Semenov, M. A., 1999, In: Nature. 400, 6746, p. 724 1 p.

    Research output: Contribution to journalJournal articlepeer-review

  180. Published

    Comments on "Testing winter wheat simulation models predictions against observed UK grain yields" by Landau et al. (1998)

    Jamieson, P. D., Porter, John Roy, Semenov, M. A., Brooks, R. J., Ewert, F. & Ritchie, J. T., 1999, In: Agricultural and Forest Meteorology. 96, p. 157-161 5 p.

    Research output: Contribution to journalJournal articlepeer-review

  181. Published

    Modelling effects of ozone exposure, elevated CO2 and weather on wheat

    Ewert, F. & Porter, John Roy, 1999. 2 p.

    Research output: Contribution to conferencePaperResearch

  182. Published

    Simulation of growth and development processes of spring wheat in response to CO2 and ozone for different sites and years in Europe using mechanistic crop simulation models

    Ewert, F., Oijen, M. V. & Porter, John Roy, 1999, In: European Journal of Agronomy. 10, p. 231-247 17 p.

    Research output: Contribution to journalJournal articlepeer-review

  183. Published

    Temperatures and the growth and development of wheat: a review

    Porter, John Roy & Gawith, M., 1999, In: European Journal of Agronomy. 10, p. 23-36 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  184. 1998
  185. Published

    A comparison of the models AFRCWHEAT2, CERES-Wheat, Sirius, SUCROS2 and SWHEAT with measurements from wheat grown under drought

    Jamieson, P. D., Porter, John Roy, Goudriaan, J., Ritchie, J. T., Keulen, H. V. & Stol, W., 1998, In: Field Crops Research. 55, p. 23-44 22 p.

    Research output: Contribution to journalJournal articlepeer-review

  186. Published

    Effects of high temperature extremes on wheat: do extreme temperature events interact in wheat?

    Wollenweber, B., Schellberg, J. & Porter, John Roy, 1998, Ikke angivet. European Commission, Fourth Framework Programme, DGXII, 4 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  187. Published

    Energetic, economic and ecological balances of a combined food and energy system

    Kuemmel, B., Langer, Vibeke, Magid, Jakob, Neergaard, A. D. & Porter, John Roy, 1998, In: Biomass & Bioenergy. (4/5), p. 407-416 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  188. Published

    IMPETUS: 1. year report on research at KVL Taastrup, DK

    Ewert, F. & Porter, John Roy, 1998, Improving wheat model accuracy and suitability for regional impact assessment (IMPETUS) : EC project ENV4-CT97-0496 : report on 1. year. Mitchell, R. A. C. (ed.). p. B25-B32 9 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  189. Published

    Interaction between soils and crop production: rational systems

    Porter, John Roy, 1998. 2 p.

    Research output: Contribution to conferencePaperResearch

  190. Published

    MODEXCROP project: model evaluation of experimental variability to improve predictability of crop yields under climate change

    Ewert, F. & Porter, John Roy, 1998, Copenhagen: Royal Veterinary and Agricultural University, Department of Agricultural Science, Agro-Ecology. 21 p.

    Research output: Book/ReportBook

  191. Published

    Making sense of wheat development: a critique of methodology

    Jamieson, P. D., Brooking, I. R., Semenov, M. A. & Porter, John Roy, 1998, In: Field Crops Research. 55, p. 117-127 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  192. Published

    Quantification of uncertainty in wheat yield prediction under future climate

    Schellberg, J., Ferris, R., Porter, John Roy, Wheeler, T. & Wollenweber, B., 1998, Ikke angivet. European Commission, Fourth Framework Programme, DGXII, 2 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  193. Published

    Research beyond the means: climatic variability and plant growth

    Porter, John Roy & Moot, D. J., 1998, EUR. Dalezios, N. R. (ed.). 18328 ed. Publications Office, p. 13-23 11 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  194. Published

    The ¤how, why and wherefore of crop simulation models

    Porter, John Roy & Jamieson, P. D., 1998, EUR. Peter, D., Maracchi, G. & Ghazi, A. (eds.). 18175 ed. Official Publications of the European Communities, p. 183-201 19 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  195. 1997
  196. Published

    Annex I: summary of presentations

    Porter, John Roy & Wollenweber, B., 1997. 4 p.

    Research output: Contribution to conferencePaperResearch

  197. Published

    Anthesis date and agricultural risk and the effects of high temperature extremes on wheat

    Porter, John Roy & Wollenweber, B., 1997. 15 p.

    Research output: Contribution to conferencePaperResearch

  198. Published

    Copenhagen experiments, improvement of the AFRCWHEAT model and application to climate change scenarios

    Wollenweber, B., Schellberg, J. & Porter, John Roy, 1997, Ikke angivet. European Commission, Fourth Framework Programme, DGXII, 5 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  199. Published

    Danish agriculture and its sustainability: a profile

    Porter, John Roy & Hjort Petersen, E., 1997, In: Ambio. 26, 7, p. 462-465 4 p.

    Research output: Contribution to journalJournal articlepeer-review

  200. Published

    Effects of extreme temperatures at two growth stages on wheat

    Porter, John Roy & Wollenweber, B., 1997. 5 p.

    Research output: Contribution to conferencePaperResearch

  201. Published

    Final report of Long Ashton Research Station (UK) to the European Stress Physiology and Climate Experiment

    Porter, John Roy & Ewert, F., 1997, In: Project 1 : wheat. EV5V-CT93-0301, 18 p.

    Research output: Contribution to journalJournal article

  202. Published

    Modelling crop yields under climate change

    Porter, John Roy & Semenov, M. A., 1997, In: Eurostat. 1997, p. 349-366 18 p.

    Research output: Contribution to journalJournal articlepeer-review

  203. Published

    Modelling ozone effects on wheat in relation to elevated CO2 and weather: short-term to seasonal responses of leaf photosynthesis

    Ewert, F. & Porter, John Roy, 1997, In: Plant, Cell and Environment. 1997

    Research output: Contribution to journalJournal articlepeer-review

  204. Published
  205. Published

    Patent nonsense

    Porter, John Roy, 1997, In: Chemistry and industry. 15, p. 626 1 p.

    Research output: Contribution to journalJournal articlepeer-review

  206. Published

    Patenting living material in the EU : report to the International Network of Engineers and Scientists

    Porter, John Roy, 1997, Ethical dimensions of sustainability. 3 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterCommunication

  207. Published

    Plant modification needs more discussion

    Porter, John Roy, 1997, In: Nature. 386, p. 111 1 p.

    Research output: Contribution to journalJournal articlepeer-review

  208. Published

    Report to the 3. CLIVARA meeting - Avignon, France, March 15-19, 1997

    Porter, John Roy & Wollenweber, B., 1997

    Research output: Other contributionCommunication

  209. Published
  210. Published
  211. Published
  212. Published

    The ¤landscape consequences of combined food and energy systems

    Porter, John Roy, 1997, Landskabsøkologiske skrifter. Brandt, J. . . A. . (ed.). 6 ed. Center for Landskabsforskning, Roskilde Universitet, p. 13-20 8 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  213. Published

    Variability and scaling: matching methods and phenomena

    Marshall, B., Crawford, J. W. & Porter, John Roy, 1997, Scaling-up : from cell to landscape. Gardingen, P. R. V., Foody, G. M. & Curran, P. J. (eds.). Cambridge: Cambridge University Press, Vol. 63. p. 253-272 20 p. (Society for Experimental Biology seminar series).

    Research output: Chapter in Book/Report/Conference proceedingBook chapterCommunication

  214. 1996
  215. Published

    A ¤simulation study of crop growth and development under climate change

    Peiris, D. R., Crawford, J. W., Grashoff, C., Jefferies, R. A., Porter, John Roy & Marshall, B., 1996, In: Agricultural and Forest Meteorology. 79, p. 271-287 17 p.

    Research output: Contribution to journalJournal articlepeer-review

  216. Published

    A ¤strategy for process modelling of short-rotation Salix coppice plantations

    Isebrands, J. G., Host, G. E., Bollmark, L., Porter, John Roy, Philippot, S., Stevens, E. & Rushton, K., 1996, In: Biomass & Bioenergy. (2/3), p. 245-252 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  217. Published

    Activities of the INES Standing Committee on Ethical Questions

    Porter, John Roy, 1996, Scientists for Global Responsibility : National Coordinating Committee report 1993-1995. p. 9-10 2 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  218. Published

    An ¤analysis of leaf emergence of spring wheat cv. Minaret grown in different environments

    Ewert, F., Porter, John Roy, Mulholland, B. J. & Vanhoutvin, S., 1996. 2 p.

    Research output: Contribution to conferencePaperResearch

  219. Published

    Annual report 1995 on the ESPACE-Wheat research at Long Ashton Research Station (UK) and Taastrup (DK)

    Ewert, F. & Porter, John Roy, 1996, ESPACE-Wheat : European Stress Physiology and Climate Experiment : project 1: Wheat : progress report. Hertstein, U. & Jäger, H-J. (eds.). p. 41-50 10 p.

    Research output: Chapter in Book/Report/Conference proceedingReport chapterResearch

  220. Published

    Demographic approaches to studies of canopy development in plants

    Porter, John Roy, 1996, In: Biomass & Bioenergy. (2-3), p. 207-214 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  221. Published

    Denmark: agriworld

    Porter, John Roy, 1996, In: The ¤furrow. 101, 2, 2 p.

    Research output: Contribution to journalJournal article

  222. Published

    Landbruget: energi og fødevareproduktion i et samlet system?

    Porter, John Roy & Olsen, H., 1996, In: Naturens Verden. 9, p. 321-326 6 p.

    Research output: Contribution to journalJournal article

  223. Published

    Mennesker kan ikke ejes

    Toft, J. & Porter, John Roy, 1996, In: Dagbladet Information. 30

    Research output: Contribution to journalJournal article

  224. Published

    Rate of change in harvest index during grain-filling of wheat

    Moot, D. J., Jamieson, P. D., Henderson, A. L., Ford, M. A. & Porter, John Roy, 1996, In: Journal of Agricultural Science. 126, p. 387-395 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  225. Published

    Research beyond the averages: climatic variability and plant growth

    Porter, John Roy, Geijn, S. C. V. D. & MacGillivray, C. W., 1996. 2 p.

    Research output: Contribution to conferencePaperResearch

  226. Published

    Temperature, CO2 and the growth and development of wheat: changes in the mean and variability of growing conditions

    Moot, D. J., Henderson, A. L., Porter, John Roy & Semenov, M. A., 1996, In: Climatic Change. 33, 3, p. 351-368 18 p.

    Research output: Contribution to journalJournal articlepeer-review

  227. Published

    Temperature, plant development and crop yields

    Atkinson, D. & Porter, John Roy, 1996, In: Trends in Plant Science. 1, 4, 6 p.

    Research output: Contribution to journalJournal articlepeer-review

  228. Published

    Use of AFRCWHEAT2 to predict the development of main stem and tillers in winter triticale and winter wheat in North East Germany

    Ewert, F., Porter, John Roy & Honermeier, B., 1996, In: European Journal of Agronomy. 5, p. 89-103 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  229. Published
  230. 1995
  231. Published

    Effects on willow

    Evans, L. G., Eckersten, H., Semenov, M. A. & Porter, John Roy, 1995, Climate change and agriculture in Europe. Harrison, P. A., Butterfield, R. E. & Downing, T. E. (eds.). Oxford: Environmental Change Unit, p. 220-223 4 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  232. Published

    Modelling the effects of climatic change and genetic modification on nitrogen use by wheat

    Porter, John Roy, Leigh, R. A., Semenov, M. A. & Miglietta, F., 1995. 22 p.

    Research output: Contribution to conferencePaperResearch

  233. Published

    The ¤final report of IACR Long Ashton Research Station to ESPACE-Wheat

    Porter, John Roy & Ewert, F., 1995

    Research output: Other contributionCommunication

  234. 1978
  235. Aggregation of Phytophthora drechsleri zoospores; pattern analysis suggests a taxis

    Porter, John Roy & Shaw, D. S., 1978, In: Transactions of the British mycological Society. 71, p. 515 518 4 p.

    Research output: Contribution to journalJournal articlepeer-review

ID: 3148511