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Control over losses of nitrogen from grassland soils (Previously NT0601) - NT1902

UK grassland soils have the potential to lose substantial amounts of N compounds other than nitrates, which impacts on the environment and results in inefficiency and financial losses to the farmer. This study will aim to quantify N losses from grassland systems so that agricultural procedures can be developed which minimise total N loss to the environment. The first part of the study will investigate the role of mineralization/ immobilisation and nitrification in controlling supplies of mobile mineral N in the soil, since mineralization is a key to development of greater N use efficiency. The dependence of mineralization/nitrification on leaching/denitrification losses will be examined using both field and laboratory techniques. The second part of the project will endeavour to provide better assessment of denitrification rates under field conditions in order to monitor overall efficiency as well as N2O fluxes from grassland soils. Data will be used to improve understanding of measurement and assessment techniques undertaken in project NT1806, as well as in additional measurements to be undertaken in farmlet experiments in CTE9505A.
Project Documents
• Final Report : Control over losses of nitrogen from grassland soils (Previously NT0601)   (111k)
Time-Scale and Cost
From: 1995

To: 1998

Cost: £327,417
Contractor / Funded Organisations
Institute of Grassland and Environment Research (IGER)
Fields of Study
Fertilisers and Nitrate Pollution