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Comparative analysis of conventional and organic farming systems: Nitrogen surpluses and nitrogen losses

Kelm, Dr. Michael; Loges, Dr. Ralf and Taube, Prof. Dr. Friedhelm (2008) Comparative analysis of conventional and organic farming systems: Nitrogen surpluses and nitrogen losses. Poster at: Cultivating the Future Based on Science: 2nd Conference of the International Society of Organic Agriculture Research ISOFAR, Modena, Italy, June 18-20, 2008.

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Summary

Nutrient management is a key factor for both economic viability and environmental performance of farming systems. On 32 representative conventional and organic farms in Northern Germany, nutrient management was analyzed in the interdisciplinary monitoring project “COMPASS”. Organic farms had significantly lower nitrogen (N) surpluses compared with conventional farms. The majority of organic farms had very low or even negative N surpluses, indicating insufficient N supply in the cropping system. Nitrogen leaching, however, was too high in many cases on both conventional and organic farms. Strategies for a more targeted nutrient supply in organic farming need to be developed and implemented.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:Nitrogen, nitrate, leaching, farming systems, crop rotation, nitrogen fixation
Subjects: Environmental aspects > Air and water emissions
Research affiliation: International Conferences > 2008: IFOAM OWC: Research Track / ISOFAR > 1.1 Interactions Production - Environment
Germany > Universität Kiel > Department of Crop Production and Plant Breeding > Grassland and Forage Production/Organic Farming
Deposited By: Kelm, Dr. Michael
ID Code:11679
Deposited On:30 Sep 2008
Last Modified:12 Apr 2010 07:35
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:This paper is published in the conference proceedings:
Neuhoff, Daniel; Halberg, Niels; Alfldi, Thomas; Lockeretz, William; Thommen, Andreas; Rasmussen, Ilse A.; Hermansen, John; Vaarst, Mette; Lck, Lorna; Carporali, Fabio; Jensen, Henning Hgh; Migliorini, Paola and Willer, Helga, Eds. (2008) .Cultivating the Future Based on Science. Proceedings of the Second Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR), held at the 16th IFOAM Organic World Congress in Cooperation with the International Federation of Organic Agriculture Movements (IFOAM) and the Consorzio ModenaBio, 18 . 20 June 2008 in Modena, Italy.. International Society of Organic Agriculture Research (ISOFAR), c/o IOL, DE-Bonn, Research Institute of Organic Agriculture FiBL, CH-Frick. http://orgprints.org/13672 and http://orgprints.org/13674

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