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To use information from NT0101 to assess the effects of husbandry practices on N loss from soil (Previously NT0102) - NT1804

In order to restrict the leaching of nitrates from arable land, practices which maximise crop recovery of soil N and supplement these effectively with fertilizer N need to be identified in order to improve guidelines for crop husbandry and efficient fertilizer use on arable crops. This study will aim to examine long-term effects of policies restricting N applications on N levels in the soil. Data produced from plots on experimental sites at Ropsley will be used to analyse changes in soil fertility and crop yield in situations where N rates have been maintained below those considered economically optimal. Long-term effects of sub-optimal N applications on available and total soil N contents, as well as crop productivity, will be studied. Data will be produced for development and verification of a model analysing effects of N application on N balance, while changes in soil physical parameters associated with recorded chemical changes will also be examined. Results will improve understanding of the N cycle and implications for N exchange between land, surface and ground waters and atmosphere. Data will also be used to develop models of nitrogen cycling present in arable agriculture.
Time-Scale and Cost
From: 1995

To: 1998

Cost: £157,237
Contractor / Funded Organisations
Fields of Study
Fertilisers and Nitrate Pollution