?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Nutrient+cycle+on+organic+farms%3A+stall+balance+of+a+suckler+herd+and+beef+bulls&rft.creator=Haas%2C+Guido&rft.creator=Wetterich%2C+Frank&rft.creator=K%C3%83%C2%B6pke%2C+Ulrich&rft.subject=+Nutrient+turnover&rft.subject=+Beef+cattle&rft.description=In+organic+agriculture%2C+the+internal+farm+nutrient+cycle+must+be+quantified+to+ensure+high+system+productivity+along+with+environmentally+sound+production+processes.+In+contrast+to+common+farmgate+and+field+balances%2C+budgeting+at+the+stable+level+is+seldom+undertaken.+When+budgeting+mixed+farming+systems%2C+a+substantial+lack+of+nutrients+can+be+detected+in+the+nutrient+flow+chain+%22forage+and+straw+input+-+stable+-+manure+output%22.+Therefore%2C+stable+balances+focus+on+a+central+component+of+whole+farm+nutrient+budgets+for+developing+efficient+nutrient+management+strategies.+At+the+experimental+farm+for+organic+agriculture+Wiesengut+in+Hennef%2C+Germany%2C+all+solid+mass+flows+for+a+suckler+herd+and+a+herd+of+beef+bulls+were+measured.+Relative+balance+values+obtained+for+dry+matter+and+C+(45+to+56%25)%2C+N+(16+to+36%25)%2C+P+(-7+to+22.5%25)%2C+K+(0+to+13%25)+and+ash+(-4+to+7%25)+showed+a+wide+range.+Balances+are+very+sensitive+to+variations+in+mass+flow+and+nutrient+content+for+components+with+high+nutrient+contents+and%2For+a+large+contribution+to+total+mass+flow+(e.g.+manure%2C+silage).+In+developing+strategies+to+minimize+N+losses%2C+by+reducing+N+surplus+in+the+ration%2C+it+has+to+be+considered%2C+that+in+contrast+to+dairy+farms%2C+a+suckler+herd+for+beef+production+integrated+in+an+organic+farm+has+to+adapt+to+crop+production+demands.%0D%0Afrom%3A+HAAS%2C+G.%2C+B.+CASPARI%2C+U.+K%C3%83%C2%96PKE+2002%3A+Nutrient+cycle+on+organic+farms%3A+stall+balance+of+a+suckler+herd+and+beef+bulls.+Nutrient+Cycling+in+Agroecosystems+64%2C+225-230.&rft.contributor=Vlek%2C+Paul+L.G.&rft.contributor=Mosier%2C+Arvin+R.&rft.date=2002&rft.type=Journal+paper&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Forgprints.org%2F1165%2F1%2Fhandbuch-kein-Dokument.pdf&rft.identifier=Haas%2C+Guido%3B+Wetterich%2C+Frank+and+K%C3%83%C2%B6pke%2C+Ulrich+(2002)+Nutrient+cycle+on+organic+farms%3A+stall+balance+of+a+suckler+herd+and+beef+bulls.+Nutrient+Cycling+in+Agroecosystems%2C+64%2C+pp.+225-230.&rft.relation=http%3A%2F%2Forgprints.org%2F1165%2F