Kelm, Dr. Michael; Loges, Dr. Ralf and Taube, Prof. Dr. Friedhelm (2007) N-Bilanzen ökologischer und konventioneller Praxisbetriebe in Norddeutsch-land – Ergebnisse aus dem Projekt COMPASS. [N surpluses of organic and conventional farms in Northern Germany – Results from the COMPASS project.] In: Zikeli, S.; Claupein, W.; Dabbert, S.; Kaufmann, B.; Müller, T. and Valle Zarate, A. (Eds.) Zwischen Tradition und Globalisierung. Beiträge zur 9. Wissenschaftstagung Ökologischer Landbau, Verlag Dr. Köster, Berlin, 1, pp. 25-28.
Nutrient balances are important agri-environmental indicators, which describe the magnitude of potential nutrient losses from farming systems to the environment. In order to analyze production systems at the entire farm scale, nitrogen balances and other agri-environmental indicators were assessed on 32 organic and conventional farms in Northern Germany. On organic farms, nitrogen fixation of legumes was determined on representative fields. Irrespective of the specialization (all-arable farms, dairy farms), nitrogen surpluses were always pronouncedly lower on organic farms compared to conventional farms. Organic farms generally conducted a sustainable nutrient management. However, the total nitrogen supply at the farm scale was not sufficient on many organic arable farms.
|EPrint Type:||Conference paper, poster, etc.|
|Type of presentation:||Paper|
|Subjects:||Environmental aspects > Air and water emissions|
|Research affiliation:||Germany > Universität Kiel > Department of Crop Production and Plant Breeding > Grassland and Forage Production/Organic Farming|
|Deposited By:||Kelm, Dr. Michael|
|Deposited On:||10 Jul 2007|
|Last Modified:||12 Apr 2010 07:35|
|Refereed:||Peer-reviewed and accepted|
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