?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Soil+Fertility+and+Biodiversity+in+Organic+Farming&rft.creator=M%C3%83%C2%A4der%2C+Paul&rft.creator=Fliessbach%2C+Andreas&rft.creator=Dubois%2C+David&rft.creator=Gunst%2C+Lucie&rft.creator=Fried%2C+Padruot&rft.creator=Niggli%2C+Urs&rft.subject=+Nutrient+turnover&rft.subject=+Soil+biology&rft.subject=+Biodiversity+and+ecosystem+services&rft.description=An+understanding+of+agroecosystems+is+a+key+to+determining+effective+farming+systems.+Here+we+report+results+from+a+21-year+study+of+agronomic+and+ecological+performance+of+biodynamic%2C+bioorganic%2C+and+conventional+farming+systems+in+Central+Europe.+We+found+crop+yields+to+be+20%25+lower+in+the+organic+systems%2C+although+input+of+fertilizer+and+energy+was+reduced+by+34+to+53%25+and+pesticide+input+by+97%25.+Enhanced+soil+fertility+and+higher+biodiversity+found+in+organic+plots+may+render+these+systems+less+dependent+on+external+inputs.&rft.date=2002-05&rft.type=Journal+paper&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Forgprints.org%2F5514%2F1%2FMaeder-2002-Science-DOC-Trial.pdf&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Forgprints.org%2F5514%2F2%2Fmaeder-et-al-Science_suppl_mat.pdf&rft.identifier=M%C3%83%C2%A4der%2C+Paul%3B+Fliessbach%2C+Andreas%3B+Dubois%2C+David%3B+Gunst%2C+Lucie%3B+Fried%2C+Padruot+and+Niggli%2C+Urs+(2002)+Soil+Fertility+and+Biodiversity+in+Organic+Farming.+Science%2C+296%2C+pp.+1694-1697.&rft.relation=http%3A%2F%2Forgprints.org%2F5514%2F