Items where Author is "Berntsen, J."

Number of eprints: 28.

Journal paper

Askegaard, M.; Thomsen, I.K.; Berntsen, J.; Hovmøller, M.S. and Kristensen, K. (2011) Performance of spring barley varieties and variety mixtures as affected by manure application and their order in an organic crop rotation. Acta Agriculturae Scand Section B - Soil and Plant Science, 61, pp. 421-430.

Berntsen, J.; Grant, R.; Olesen, J.E.; Kristensen, I.S.; Vinther, F.P.; Mølgaard, J.P. and Petersen, B.M. (2006) Nitrate leaching from organic farming systems with rotational grass-clover and arable crops. Soil Use and Management, 22, pp. 197-208.

Berntsen, J.; Petersen, B.M. and Olesen, J.E. (2006) Simulating trends in crop yield and soil carbon in a long-term experiment – effects of rising CO2, N deposition and improved cultivation. Plant and Soil, 287, pp. 235-245.

Petersen, B.M.; Berntsen, J.; Hansen, S. and Jensen, L.S. (2005) CN-SIM - a model for the turnover of soil organic matter. I: Long term carbon development. Soil Biology and Biochemistry, 37, pp. 359-374.

Petersen, B.M.; Jensen, L.S.; Berntsen, J.; Hansen, S.; Pedersen, A.; Henriksen, T.M.; Sørensen, P. and Trinsoutrot, I. (2005) CN-SIM - a model for the turnover of soil organic mattter. II: Short term carbon and nitrogen development. Soil Biology and Biochemistry, 37, pp. 375-393.

Chatskikh, D.; Olesen, J.E.; Berntsen, J.; Regina, K. and Yamulki, S. (2005) Simulation of effect of climate, soils and management on N2O emission from grassland. Biogeochemistry, 76, pp. 395-419.

Berntsen, J.; Petersen, B.M.; Olesen, J.E.; Eriksen, J. and Søegaard, K. (2005) Simulation of residual effects and nitrate leaching after incorporation of different ley types. European Journal of Agronomy, 29, pp. 290-304.

Petersen, B.M.; Berntsen, J.; Kristensen, I.S. and Olesen, J.E. (2004) Samme udvaskning af kvælstof ved økologisk og konventionel planteavl. FØJOenyt.

Nielsen, N.E.; Thomsen, I.K. and Berntsen, J. (2004) Sortsforskelle i næringsstofoptagelse, vækst og kerneudbytter af vårbyg til økologisk dyrkning. [Differences in spring barley cultivars as regards nutrien utilization, growth and yields in organic farming.] FØJOenyt. Nyhedsbrev fra Forskningscenter for Økologisk Jordbrug.

Petersen, B.M. and Berntsen, J. (2003) The turnover of soil organic matter on different farm types. DARCOFenews (3).

Newspaper or magazine article

Hovmøller, M.S.; Berntsen, J. and Thomsen, I. (2005) Bladsygdomme på byg afhænger af sort, placering i sædskiftet og gødningstype. [Foliar diseases in barley depend on host cultivar, location in crop rotation and type of fertilization.] Føjoenyt, February 2005.

Olesen, J.E. and Berntsen, J. (2004) Simulating crop production and nitrate leaching losses from organic arable crop production. DARCOFenews, December 2004, 4, - .

Working paper

Hovmøller, M.S.; Berntsen, J. and Kristensen, K. (2006) Impact of foliar diseases in organically grown barley: Influence of fertilization, nutrient content in leaves, varietal disease resistance characteristics and yield potential. Working paper. [Unpublished]

Nielsen, Professor N.E.; Thomsen, Senior Scientist I.K. and Berntsen, Senior Scientist J. (2004) Do nutrient uptakes and grain yields differ between spring barley varieties grown for organic farming as mono-crop and in mixture: Characteristics of spring barley varieties for organic farming. Working paper. [Unpublished]

Conference paper, poster, etc.

Halberg, Niels; Dalgaard, R.; Berntsen, J.; Olesen, J.E. and Dalgaard, T. (2005) Organic cash crop farms as net energy producers: Energy balances and environmental effects. Paper at: Researching Sustainable Systems - International Scientific Conference on Organic Agriculture, Adelaide, Australia, September 21-23, 2005. [Unpublished]

Petersen, B.M. and Berntsen, J. (2004) Modelling Long Term Soil Carbon and Radiocarbon Dynamics with CN-SIM. In: Biological Systems simulation conference, Gainesville, Florida, 8-10 March 2004. Book of abstracts, pp. 61-62.

Petersen, B.M. and Berntsen, J. (2004) Modelling soil C and 14C development. In: International COST ACTION symposium 3rd - 6th June 2004, Ghent, Belgium. Book of abstracts, p. 59.

Olesen, J.E.; Berntsen, J.; Petersen, B.M. and Kristensen, I.S. (2004) Nitrate leaching from organic and conventional crop production farms. In: The role of part-time and pluri-active farmers in rural development and natural resource management. Abstracts, NJF Seminars, no. 357, p. 19.

Petersen, B.M.; Berntsen, J.; Jensen, L.S. and Hansen, S. (2003) Modelling long term carbon and radiocarbon development. In: Abstracts for the 12th N workshop. 21-24 September, 2003 Exeter, Devon, UK.

Petersen, B.M.; Jensen, L.S.; Berntsen, J.; Hansen, S. and Pedersen, A. (2003) Modelling short term carbon and nitrogen development. In: Abstracts for the 12th N workshop.

Petersen, B.M. and Berntsen, J. (2002) Omsætning i jordpuljen på forskellige bedriftstyper. Speech at: Kvælstofbalancer på landbrugsbedriften - status og perspektiv, Foulum, Denmark, 24-04-2002.

Petersen, B.M. and Berntsen, J. (2001) Using C-Tool to simulate soil carbon and radiocarbon development. In: COST 627. Carbon storage in European Grasslands. Danish Institute of Agricultual Sciences, Research Centre Foulum. Book of Abstracts, DIAS.

Report

Berntsen, J.; Petersen, B.M.; Kristensen, I.S. and Olesen, J.E. (2004) Nitratudvaskning fra økologiske og konventionalle planteavlsbedrifter - simuleringer med FASSET bedriftsmodellen. Markbrug, no. 107. Danmarks JordbrugsForskning .

Berntsen, J.; Petersen, B.M.; Kristensen, I.S. and Olesen, J.E. (2004) Nitratudvaskning fra økologiske og konventionelle planteavlsbedrifter - simuleringer med FASSET bedriftsmodellen. Intern rapport, no. 56. Forskningscenter for Økologisk Jordbrug (FØJO) .

Report chapter

Dalgaard, R.; Olesen, J.E.; Halberg, N. and Berntsen, J. (2004) Miljøeffekter og energibalancer ved energiproduktion på økologiske planteavlsbedrifter. In: Jørgensen, U. and Dalgaard, T. (Eds.) Energi i økologisk jordbrug. Reduktion af fossilt energiforbrug og produktion af vedvarende energi. FØJO-rapport, no. 19. Danish Research Centre for Organic Farming , chapter 6, pp. 103-123.

Petersen, B.M. and Berntsen, J. (2002) Omsætning i jordpuljen på forskellige bedriftstyper. In: Kvælstofbalancer på landbrugsbedriften - status og perspektiver. DJF intern rapport 157.. DIAS internal report, no. 157. , pp. 41-47.

Book chapter

Berntsen, J.; Petersen, B.M. and Olesen, J.E. (2007) Simulating trends in crop yield and soil carbon in a long-term experiment - effects of rising CO2, N deposition and improved cultivation. In: Kersebaum, K.C.; Hecker, J.-M.; Mirschel, W. and Wegehenkel, M. (Eds.) Modelling water and nutrient dynamics in soil-crop systems. Springer, Netherlands, chapter 14, pp. 197-207.

Olesen, J.E.; Sørensen, P.; Thomsen, I.K.; Eriksen, J.; Thomsen, A.G. and Berntsen, J. (2004) Integrated nitrogen input systems in Denmark. In: Mosier, A.R.; Syers, J.K. and Freney, J.R. (Eds.) Agriculture and the nitrogen cycle: assessing the impacts of fertilizer use on food production and the environment. SCOPE, no. 65. Island Press, , chapter 9, pp. 129-140.

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