11956: Sustainable nutrient supply of organic farming challenged by specialisation

Hansen, Sissel; A. Bleken, Marina; Løes, Anne-Kristin; Govasmark, Espen; Falk Øgaard, Anne and Breland, Tor Arvid (2007) Sustainable nutrient supply of organic farming challenged by specialisation . Paper presented at NJF 23rd Congress 2007 - Trends and Perspectives in Agriculture, Copenhagen, June 26-29 2007; Published in Lund, Mogens and Larsen, Torben Ulf, Eds. NJF Report: NJF 23rd Congress 2007 - Trends and Perspectives in Agriculture 3(2), page pp. 193-194. NJF Report 3 (2). Nordic Association of Agricultural Scientists.

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Summary

Diverse production on each farm, with livestock density well balanced with crop production, has been the traditional way to maintain the soil fertility in organic farming systems. However, there is a trend of specialisation into stockless arable or livestock farms. Stockless farming is challenged by depletion of soil mineral reserves and soil organic matter, risk of large nutrient losses after green manuring, and dependence on nutrient supply from external sources. In this paper, we focus on these challenges to sustained soil fertility.

Document Language:	English
Keywords:	sustainability, nutrient depletion, green manure, organic farming systems
Subject Areas:	Environmental aspects "Organics" in general Farming Systems > Farm nutrient management
Research affiliation:	Sweden > Nordic Association of Agricultural Scientists NJF Norway > Bioforsk - Norwegian Institute for Agriculture and Environmental Research > Bioforsk Organic Food and Farming Division
Total budget (Euro):	0
Orgprints ID Number:	11956
Contact:	Hansen, Senior Scientist Sissel
Deposited On:	01 November 2007
EPrint Type:	Conference paper
Published?:	Published
Online at:	http://www.njf2007.dk/theme/t10/2_1_S_Hansen.pdf
Peer Review Status:	Not peer-reviewed

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