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Improve guidelines on waste management practices which will minimise ..... (New code NT1402) - NT0301
NT0301. Organic manures and nitrate leaching.
Poor handling and land application of livestock wastes can lead to nutrient loss by run-off and contribute to nitrate leaching and increased levels of nitrates in drinking water. This study will aim to improve guidelines on waste management practices which will minimise the short- and long-term risk of nitrate leaching from animal manures applied to arable crops. Efficient and environmentally sound methods will be developed for the following: utilisation of pig and cattle manures as an N source for winter and spring cereals; use of poultry manure as an N source for winter cereals; and utilisation of N in poultry manures applied to arable land prior to root crops, including quantification of the residual effects on subsequent cereal crops. The short and long term contribution of cattle, pig and poultry manures to the N requirements of arable crop rotations will be evaluated. Cut off dates will be defined, before which various types of manure should not be applied to NSAs and the benefits of winter cover crops in minimising nitrate leaching losses from autumn/winter-applied manures will be assessed. The improved efficiency of animal wastes as a source of N, when applied to arable crops in the spring, will be verified on a field scale and N mineralisation from applied organic (part) manures will be evaluated in relation to crop demand and nitrate leaching potential. Data obtained in this study will contribute to further understanding of the N cycle and the fate of manure N following land application.
To develop efficient and environmentally sound methods of
utilising pig and cattle manures as a nitrogen source for
winter and spring cereals. Complete field work, harvest 1993
. To develop efficient and environmentally sound methods of
using poultry manure as a nitrogen source for winter
cereals. Data collection, manipulation and analysis.
To develop efficient methods of utilising N in poultry
manures applied to arable land prior to root crops,
including quantifying the residual effects on subsequent
To evaluate the short and long term contribution of cattle,
pig and poultry manures to the nitrogen requirements of
arable crop rotations.
To define cut-off date before which various types of manures
should not be applied in NSAs.
To assess the benefit of winter cover crops in minimising
nitrate leaching losses from autumn/winter applied manures.
To verify on a field scale, the improved efficiency of
animal wastes as a source of N, when applied to arable crops
in the spring.
To evaluate nitrogen mineralisation from applied organic
manures in relation to crop demand and nitrate leaching
To develop a simple working model/decision support system
for predicting crop N availability and losses following
applications of organic manures to land .
To quantity P and nitrate losses and examine organic and
microbiological contamination of surface water following
organic manure applications to medium fine textured soils.
Also to identify practices likely to reduce surface runoff
To quantify P and nitrate leaching losses following the
application of organic manures to drained clay soils in low
rainfall areas. Also to assess the extent of organic and
microbiological contamination of drainage water following
Time-Scale and Cost
Contractor / Funded Organisations
ADAS UK Ltd.
Fields of Study
Fertilisers and Nitrate Pollution