John Roy Porter

Research output

Research output per year 1978 1996 1997 1998 2000 2007 2009 2010 2011 2014 2019

• 101 Journal article
• 17 Paper
• 15 Book chapter
• 13 Article in proceedings
• 51 More
  • 8 Comment/debate
  • 6 Book
  • 6 Other contribution
  • 5 Report
  • 5 Letter
  • 4 Report chapter
  • 4 Contribution to newspaper - Newspaper article
  • 3 Conference abstract in proceedings
  • 3 Review
  • 2 Poster
  • 1 Ph.D. thesis
  • 1 Conference abstract for conference
  • 1 Conference abstract in journal
  • 1 Contribution to newspaper - Feature article
  • 1 Working paper

Research output per year

Research output per year

Search results

• 2011

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

  Ghaley, B. B., Montesino San Martin, M. & Porter, J. R., 2011. 1 p.

  Research output: Contribution to conference › Poster › Research

  • emergy 100%
  • production technology 49%
  • ecosystems 44%
  • ecosystem services 25%
  • food prices 15%
  6939 Downloads (Pure)

• How will growing cities eat?

  Porter, J. R., Deutsch, L., Dumaresq, D. & Dyball, R., 6 Jan 2011, In: Nature. 469, p. 34 1 p.

  Research output: Contribution to journal › Comment/debate › Research › peer-review

  2 Citations (Scopus)

• Obituary: E.J.M. Kirby

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

  Research output: Contribution to journal › Journal article › Research › peer-review

• 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, J. R., Rosenzweig, C. E., Rice, C. W. & Climate Change Working Group, 2011, American Society of Agronomy. 12 p.

  Research output: Book/Report › Book › Research › peer-review

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

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

  Research output: Contribution to journal › Journal article › Research › peer-review

  • enzyme activity 100%
  • cold storage 97%
  • conditioning 94%
  • cold 67%
  • soil 48%
  2 Citations (Scopus)

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

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

  Research output: Contribution to journal › Journal article › Research › peer-review

  • soil emission 100%
  • nitrous oxide 85%
  • respiration 66%
  • carbon dioxide 58%
  • soil 37%
  44 Citations (Scopus)

• Vi skal brødføde ni milliarder

  Porter, J. R., Streibig, J. C. & Weiner, J., 1 Sept 2011, In: Weekendavisen Berlingske. p. 11 1 p.

  Research output: Contribution to journal › Contribution to newspaper - Newspaper article
• 2010

  Agronomy as the science of primary food production

  Porter, J. R., 2010, Proceedings of Agro2010 the XI^th ESA Congress: 2010, Montpellier, France. p. 41-42 2 p.

  Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

• 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, J. R., Wang, Q. & Zhang, Y., Dec 2010, In: Energy Conversion and Management. 51, 12, p. 2565-2574 10 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  • Molecular beam epitaxy 100%
  • Calibration 99%
  • Statistics 48%
  28 Citations (Scopus)

• Climate Change and Agriculture: The heart of a perfect storm

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

  Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research › peer-review

• Det europæiske fødevaresystem og fremtidens scenarier for landbrug

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

  Research output: Contribution to journal › Journal article › Research

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

  Patil, R. H., Lægdsmand, M., Olesen, J. E. & Porter, J. R., 15 Oct 2010, In: Agriculture, Ecosystems & Environment. 139, 1-2, p. 195-205 11 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  • warming 100%
  • Europe 88%
  • rainfall 80%
  • soil 54%
  • leaching 45%
  59 Citations (Scopus)

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

  Chirinda, N., Carter, M. S., Albert, K. R., Ambus, P. L., Olesen, J. E., Porter, J. R. & Petersen, S. O., 15 Mar 2010, In: Agriculture, Ecosystems & Environment. 136, 3-4, p. 199-208 10 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  • nitrous oxide 100%
  • cropping practice 96%
  • soil type 90%
  • soil temperature 28%
  • crop rotation 24%
  97 Citations (Scopus)

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

  Porter, J. R., 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 proceeding › Article in proceedings › Research › peer-review

• Food security: focus on agriculture

  Porter, J. R., Challinor, A., Ewert, F., Falloon, P., Fischer, T., Gregory, P., Van Ittersum, M. K., Olesen, J. E., Moore, K. J., Rosensweig, C. & Smith, P., 9 Apr 2010, In: Science. 328, p. 172 1 p.

  Research output: Contribution to journal › Letter › peer-review

  9 Citations (Scopus)

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

  Henriksen, C. B., Monty, A. & Porter, J. R., 2010, In: Tidsskriftet Læring og Medier (LOM). 6, p. 1-21 21 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

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

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

  Research output: Contribution to journal › Journal article › Research › peer-review

  • soil heating 100%
  • Triticum 81%
  • Soil 72%
  • winter wheat 64%
  • rain 52%
  46 Citations (Scopus)

• Læbælter til energi og marker til fødevareproduktion

  Porter, J. R., 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 journal › Journal article › Research

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

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

  Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

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

  Chirinda, N., Olesen, J. E., Porter, J. R. & Schjønning, P., 15 Dec 2010, In: Agriculture, Ecosystems & Environment. 139, 4, p. 584-594 11 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  • catch crop 100%
  • inorganic fertilizer 82%
  • organic fertiliser 75%
  • crop production 64%
  • cropping practice 59%
  90 Citations (Scopus)

• The Rubisco enzyme and agricultural productivity

  Porter, J. R. & Wollenweber, B., 18 Feb 2010, In: Nature Correspondence. 463, 7283, p. 876 1 p.

  Research output: Contribution to journal › Comment/debate › Research › peer-review

  4 Citations (Scopus)
• 2009

  Agriculture and technology

  Porter, J. R. & Rasmussen, J., 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 proceeding › Book chapter › Research

• Biomass for biofuels - the challenge and a possible way forward

  Felby, C., Porter, J. R., Rasmussen, S., Schjørring, J. K., Nielsen, T. H., Sakuragi, Y. & Willats, W. G. T., 2009. 1 p.

  Research output: Contribution to conference › Conference abstract for conference › Research

• 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, J. R., 2009, In: Agricultural and Forest Meteorology. 149, 3-4, p. 697-710 14 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  • Yellow River 100%
  • calibration 67%
  • solar radiation 61%
  • river basin 53%
  • timescale 49%
  61 Citations (Scopus)

• Chemical stress can increase crop yield

  Cedergreen, N., Felby, C., Porter, J. R. & Streibig, J. C., 2009, In: Field Crops Research. 114, 1, p. 54-57 4 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  53 Citations (Scopus)

• E-learning, climate change and carbon footprints

  Henriksen, C. B., Monty, A. & Porter, J. R., 2009, In: Institute of Physics Conference Series. 1 p.

  Research output: Contribution to journal › Conference abstract in journal › Research

• Evaluation of temperature-based global solar radiation models in China

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

  Research output: Contribution to journal › Journal article › Research › peer-review

  • solar radiation 100%
  • China 72%
  • evaluation 54%
  • temperature 45%
  • advection 23%
  125 Citations (Scopus)

• The Copenhagen Climate Congress - future agricultural production and climate change

  Porter, J. R., 2009, In: FNAT. 4, p. 10-11 2 p.

  Research output: Contribution to journal › Journal article › Communication

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

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

  Research output: Contribution to journal › Journal article › Research › peer-review

  • food service 100%
  • Ecosystem 88%
  • ecosystem services 79%
  • ecosystem service 66%
  • ecosystems 55%
  130 Citations (Scopus)

• 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, J. R., 2009, In: Agricultural Water Management. 96, 7, p. 1137-1145 9 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  • Food and Agricultural Organization 100%
  • evapotranspiration 92%
  • longitude 71%
  • crop 62%
  • calibration 56%
  37 Citations (Scopus)
• 2008

  Biofuels: putting current practices in perspective

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

  Research output: Contribution to journal › Comment/debate › Research

  8 Citations (Scopus)

• Ecosystem services from agriculture

  Porter, J. R. & 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 proceeding › Conference abstract in proceedings › Research

• En global kulstofbank mod CO₂-udslip

  Porter, J. R. & Streibig, J. C., 2008, In: Berlingske Tidende. p. 23 1 p.

  Research output: Contribution to journal › Contribution to newspaper - Feature article

• 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, J. R., Rafoss, T., Riccioni, L. & Thorne, F., 2008, In: Plant Pathology. 57, 4, p. 603-611 9 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  21 Citations (Scopus)
• 2007

  Afgrødernes respons på klimaændringer

  Porter, J. R., 2007. 2 p.

  Research output: Contribution to conference › Paper › Research

• Bioethanol i tanken udelukker ikke mad i maven

  Felby, C., Streibig, J. C. & Porter, J. R., 2007, In: Dagbladet Information. 2 p.

  Research output: Contribution to journal › Contribution to newspaper - Newspaper article

• Choosing crops as energy feedstocks

  Porter, J. R., Kirsch, M. M. N., Streibig, J. C. & Felby, C., 2007, In: Nature Biotechnology. 25, 7, p. 716-717 1 p.

  Research output: Contribution to journal › Letter › peer-review

  9 Citations (Scopus)

• Crop models, CO₂, and Climate Change

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

  Research output: Contribution to journal › Letter › peer-review

• 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, J. R. & Kull, O., 2007, University of Joensuu, Faculty of Forestry. 86 p.

  Research output: Book/Report › Book › Research

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

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

  Research output: Contribution to journal › Journal article › Communication

• 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, J. R., 2007, In: Field Crops Research. 103, 1, p. 36-41 6 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  53 Citations (Scopus)

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

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

  Research output: Working paper › Research

• We must know what is green before we tax

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

  Research output: Contribution to journal › Contribution to newspaper - Newspaper article

  • food prices 100%
  • taxes 93%
  • biofuels 70%

• Wheat production systems and global climate change: chapter 16

  Porter, J. R., 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 proceeding › Book chapter › Research
• 2006

  Agroecology education and research: an academic platform for organic farming

  Francis, C., Breland, T. A., Lieblein, G., Moulton, M., Salomonsen, L., Geber, U., Langer, V., Sriskandarajah, N., Porter, J. R. & 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 proceeding › Article in proceedings › Research

• 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, V., Porter, J. R. & 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 proceeding › Article in proceedings › Research

• En anden slags grøn revolution venter

  Felby, C., Streibig, J. C. & Porter, J. R., 2006, In: Morgenavisen Jyllands-Posten. 136, 20, 1 p.

  Research output: Contribution to journal › Contribution to newspaper - Newspaper article

• 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, J. R. & Triboi, E., 2006, In: European Journal of Agronomy. 25, 2, p. 138-154 17 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  125 Citations (Scopus)

• Modelling protein content and composition in wheat

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

  Research output: Contribution to conference › Poster › Research

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

  Porter, J. R., 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 proceeding › Report chapter › Research

  • biofuel 100%
  • agriculture 68%
  • climate change 56%
  • renewable energy source 55%
  • energy 46%