http://orgprints.org/9885/ Apparent N Balance in Organic and Conventional Low Input Cropping Systems The determination of nutrient surplus is one of the indicators of potential N losses from the agricultural system to the environment. An experiment was started in 1998 in Central Italy to evaluate the soil surface N balance of an organic and a conventional low input cropping system over a long term crop rotation. Results at the end of a 6-year crop rotation showed an estimated N surplus in organic system 1.3-2 times higher than in conventional system while N content in the top soil was not different in the two systems, so that organic system should have involved a higher N loss from that soil layer. Boldrini, Arianna Benincasa, Paolo Tosti, Giacomo Tei, Francesco Guiducci, Marcello farm_nutrient_management int_conf_2007qlif_3_crops it_perugia Apparent N Balance in Organic and Conventional Low Input Cropping Systems 2007-03-05 Boldrini, Arianna; Benincasa, Paolo; Tosti, Giacomo; Tei, Francesco and Guiducci, Marcello (2007) Apparent N Balance in Organic and Conventional Low Input Cropping Systems. 3rd QLIF Congress: Improving Sustainability in Organic and Low Input Food Production Systems, University of Hohenheim, Germany, March 20-23, 2007. application/pdf