?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Bodenfruchtbarkeit+und+biologische+Vielfalt+im+%C3%83%C2%B6kologischen+Landbau&rft.creator=M%C3%83%C2%A4der%2C+Dr.+Paul&rft.creator=Fliessbach%2C+Dr.+Andreas&rft.creator=Dubois%2C+Dr.+David&rft.creator=Gunst%2C+Lucie&rft.creator=Fried%2C+Dr.+Padruot&rft.creator=Niggli%2C+Dr.+Urs&rft.subject=+Farming+Systems&rft.subject=+Soil+biology&rft.subject=+Biodiversity+and+ecosystem+services&rft.subject=+Soil+quality&rft.description=Um+die+Effektivit%C3%83%C2%A4t+landwirtschaftlicher+Anbausysteme+zu+beurteilen%2C+bedarf+es+eines+Verst%C3%83%C2%A4ndnisses+der+Agrar%C3%83%C2%B6kosysteme.+Eine+21-j%C3%83%C2%A4hrige+Studie+ergab+20+Prozent+geringere+Ertr%C3%83%C2%A4ge+bei+%C3%83%C2%B6kologischen+Anbausystemen+gegen%C3%83%C2%BCber+konventionellen%2C+obgleich+der+Einsatz+von+D%C3%83%C2%BCngemitteln+und+Energie+um+34+bis+53+Prozent+und+der+von+Pestiziden+um+97+Prozent+geringer+war.+Wahrscheinlich+f%C3%83%C2%BChren+die+erh%C3%83%C2%B6hte+Bodenfruchtbarkeit+und+die+gr%C3%83%C2%B6%C3%83%C2%9Fere+biologische+Vielfalt+in+den+%C3%83%C2%B6kologischen+Versuchsparzellen+dazu%2C+dass+diese+Systeme+weniger+auf+Zufuhr+von+au%C3%83%C2%9Fen+angewiesen+sind.&rft.publisher=Stiftung+Oekologie+%26+Landbau&rft.date=2002-07&rft.type=Journal+paper&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Forgprints.org%2F302%2F1%2Fmaeder-et-al-2002-oel-dok-science.pdf&rft.identifier=M%C3%83%C2%A4der%2C+Dr.+Paul%3B+Fliessbach%2C+Dr.+Andreas%3B+Dubois%2C+Dr.+David%3B+Gunst%2C+Lucie%3B+Fried%2C+Dr.+Padruot+and+Niggli%2C+Dr.+Urs+(2002)+Bodenfruchtbarkeit+und+biologische+Vielfalt+im+%C3%83%C2%B6kologischen+Landbau.+[Soil+fertilty+and+biodiversity+in+organic+farming.]+Oekologie+%26+Landbau%2C+124%2C+pp.+12-16.&rft.relation=http%3A%2F%2Forgprints.org%2F302%2F