eprintid: 1402
rev_number: 2
eprint_status: archive
userid: 728
dir: disk0/00/00/14/02
datestamp: 2004-01-29
lastmod: 2010-04-12 07:28:13
status_changed: 2009-08-20 14:20:33
type: bookchapter
metadata_visibility: show
item_issues_count: 0
doclang: en
publishedas: ISBN 1-901502-76-7



projects: de-uni-bonn-iol-umwelt
refereed: yes
budget: 0
altloc: http://www.cig.ensmp.fr/~iahs/redbooks/273.htm
publicfulltext: TRUE
creators_name: Haas, Guido
creators_name: Berg, Martin
creators_name: Köpke, Ulrich
title: Nitrate leaching: comparing conventional, integrated and organic agricultural production systems
ispublished: pub
subjects: 5emissions
keywords: catchment area; conventional farming; crop rotation; field trial; Germany; groundwater supply; integrated farming; nitrate leaching; organic farming; production systems 
suggestions: bp, themengebiet o.k.? fand nichts besseres!
abstract: 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.
date: 2002-04
date_type: published
publication: Agricultural Effects on Ground and Surface Waters: Research at the Edge of Science and Society
publisher: International Association of Hydrological Sciences, IAHS Publ. 273, Oxfordshire, UK
editors_name: Steenvoorden, Joop
editors_name: Claessen, Frans
editors_name: Willems, Jaap
full_text_status: public
pagerange: 131-136
fp7_project: no
access_rights: info:eu-repo/semantics/openAccess
citation:    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.         
document_url: /id/eprint/1402/1/handbuch-kein-Dokument.pdf