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Nitrate leaching: comparing conventional, integrated and organic agricultural production systems

Haas, Guido; Berg, Martin and Köpke, Ulrich (2002) Nitrate leaching: comparing conventional, integrated and organic agricultural production systems. In: Steenvoorden, Joop; Claessen, Frans and Willems, Jaap (Eds.) Agricultural Effects on Ground and Surface Waters: Research at the Edge of Science and Society. International Association of Hydrological Sciences, IAHS Publ. 273, Oxfordshire, UK, pp. 131-136.

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Summary

The impact of conventional, integrated and organic practices on groundwater quality were studied in northwestern Germany. Between 1993 and 1997 nitrogen budgets and the nitrate content of the unsaturated zone (soil sampling and porous suction cups) were measured in two field trials located on a clayey loam and a loamy sand, respectively. In each year of investigation three main crops per farming system were compared according to the defined site(soil)-adapted crop rotation. There was little decrease in the NO3-concentration of the percolate and the amount of leached N (15% less) by shifting from conventional practice to integrated farming. Converting to organic farming reduced leaching losses of nitrogen by more than 50 %. Yields of the organic field plots were lower, but comparing the cash crop yields in relation to the amount of leached nitrate, the production efficiency (nitrate-N leached related to yield of crops) of the organic farming system was still clearly higher.
from: HAAS, G., M. BERG & U. KÖPKE 2002: Nitrate leaching: comparing conventional, integrated and organic agricultural production systems. In: Agricultural Effects on Ground and Surface Waters - Research at the Edge of Science and Society. S. 131-136. International Association of Hydrological Science 273.


EPrint Type:Book chapter
Keywords:catchment area; conventional farming; crop rotation; field trial; Germany; groundwater supply; integrated farming; nitrate leaching; organic farming; production systems
Subjects: Environmental aspects > Air and water emissions
Research affiliation: Germany > University of Bonn > Institute of Organic Agriculture > Environment
Related Links:http://www.cig.ensmp.fr/~iahs/redbooks/273.htm
Deposited By: Haas, Dr. Guido
ID Code:1402
Deposited On:29 Jan 2004
Last Modified:12 Apr 2010 07:28
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:ISBN 1-901502-76-7

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