?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=https%3A%2F%2Forgprints.org%2Fid%2Feprint%2F31287%2F&rft.title=Crop+yields+and+supply+of+nitrogen+compared+in+conventional+and+organic+farming+systems&rft.creator=Alaru%2C+Maarika&rft.creator=Talgre%2C+Liina&rft.creator=Eremeev%2C+Viacheslav&rft.creator=Tein%2C+Berit&rft.creator=Luik%2C+Anne&rft.creator=Nemvalts%2C+Anu&rft.creator=Loit%2C+Evelin&rft.subject=+Soil+quality&rft.subject=+Soil+tillage&rft.subject=+Air+and+water+emissions&rft.description=The+aim+of+organic+agriculture+is+to+produce+food+of+high+nutritional+quality+in+sufficient+quantity.+Field+experiments+were+conducted+to+evaluate+the+effect+of+organic+and+conventional+growing+systems+on+(i)+total+amounts+and+sup-ply+of+N+taken+up+or+applied+to+plants+during+a+five+year+crop+cycle+period+and+(ii)+crops+total+dry+matter+(DM)+yield+obtained+during+same+period.+The+total+DM+yields+from+the+organic+treatments+were+25%E2%80%9333%25+smaller+than+from+the+conventional+treatments.+The+ratio+of+N+output%2FN+input+was+significantly+the+smallest+in+the+organic+treatment+with+cattle+manure%2C+where+only+37%25+of+all+supplied+N+was+used+by+plants+during+the+crop+cycle+period.+The+organic+fertiliser+with+faster+mineralisation+rate+and+splitting+the+application+of+organic+N+during+crop+cycle+period+would+be+more+appropriate+to+supply+sufficient+quantities+of+N+during+rapid+plant+growth+and+to+obtain+higher+crop+yields+in+organic+farming+systems.&rft.date=2014&rft.type=Journal+paper&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=%2Fid%2Feprint%2F31287%2F1%2Falaru-etal-2014-Agri_FoodSci-Vol23-issue4-p317-326.pdf&rft.identifier=+++Alaru%2C+Maarika%3B+Talgre%2C+Liina%3B+Eremeev%2C+Viacheslav%3B+Tein%2C+Berit%3B+Luik%2C+Anne%3B+Nemvalts%2C+Anu+and+Loit%2C+Evelin+++(2014)+Crop+yields+and+supply+of+nitrogen+compared+in+conventional+and+organic+farming+systems.+++Agricultural+and+Food+Science%2C+23+(4)%2C+pp.+317-326.++++++++