?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=A+guide+to+organic+grassland&rft.creator=Philipps%2C+Lois&rft.subject=Crop+health%2C+quality%2C+protection&rft.subject=+Pasture+and+forage+crops&rft.subject=+Education%2C+extension+and+communication&rft.subject=+Feeding+and+growth&rft.description=Organic+farming+systems+in+the+UK+are+traditionally+based+on+ley%2Farable+crop+rotations.+Up+to+70%25+of+the+farmed+area+comprises+of+mixed+grass+and+legume+leys.+These+leys+offer+a+powerful+mechanism+for+supplying+nitrogen+through+their+potential+to+harvest+biologically+fixed+nitrogen+to+support+both+animal+production+and+a+subsequent+phase+of+arable+cropping.++This+bulletin+answers+some+of+the+common+questions+about+organic+grassland+management.&rft.date=2001-07&rft.type=Journal+paper&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Forgprints.org%2F10812%2F1%2FA_guide_to_organic_grassland.pdf&rft.identifier=Philipps%2C+Lois+(2001)+A+guide+to+organic+grassland.+Elm+Farm+Research+Centre+Bulletin+(56)%2C+pp.+9-10.&rft.relation=http%3A%2F%2Forgprints.org%2F10812%2F