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Nitrogen leaching from organic agriculture and conventinal crop rotations


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Benoit, Marie and Garnier, Josette (2014) Nitrogen leaching from organic agriculture and conventinal crop rotations. In: Rahmann, G. and Aksoy, U. (Eds.) Building Organic Bridges, Johann Heinrich von Thünen-Institut, Braunschweig, Germany, 1, Thuenen Report, no. 20, pp. 283-286.

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The goal of our study is to investigate nitrogen leaching from organic agriculture, taking into account a complete organic rotation (6-9 years) and to compare the results with leaching from conventional systems. There are long time series on sub-root crop concentrations in conventional agriculture in the Seine Basin. These scored an average of 25 ± 4 mg N-NO3.l-1 (standard for drinking water is 11 mg N-NO3.l-1) in different types of soil, crops and climatic conditions. However, no data still exists for organic farming (OF) in this area. In 2012-2013, a total of eight practices of arable crops have been equipped with suction cups for all their rotations (5 in OF and 3 in CF), in three pedoclimatic situations, in order to determine concentrations and fluxes of nitrogen leached. In the conditions of the first step of our study, the average of sub-root concentrations in the organic rotations was 11 ± 6 mgN-NO3.l-1 (N=35) against 26 ± 9 mgN-NO3.l-1 (N=8) for the conventional ones. Organic farming in the north of France could therefore reduce by 60% the nitrogen leaching potential compared to conventional practices widely spread in the Ile-de-France Region and the Seine Basin.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Speech
Keywords:sub-root concentration, nitrogen leaching, organic and conventional farming,ceramic cups
Agrovoc keywords:
Subjects: Soil > Nutrient turnover
Environmental aspects > Air and water emissions
Farming Systems > Farm nutrient management
Crop husbandry > Post harvest management and techniques
Research affiliation: France > Other organizations
International Conferences > 2014: 18th IFOAM OWC Scientific Track: 4th ISOFAR Scientific Conference
Deposited By: BENOIT, Mrs Marie
ID Code:23831
Deposited On:28 Oct 2014 13:35
Last Modified:28 Oct 2014 13:35
Document Language:English
Refereed:Peer-reviewed and accepted
Additional Publishing Information:urn:nbn:de:gbv:253-201407-dn053621-1

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