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To develop means of reducing effluent emissions from earth-floored field silage production - WA0106

Description
This study will aim to quantify the water pollution risk from silage made in field heaps and to assess risks of pollution from big bale silage. The study will build on existing work (conducted in 1992--1993) involving a literature review, a survey of 30 farms making silage in field heaps and the development of techniques to measure the presence of effluent in soil water. In order to gain information on the pattern and depth of effluent flow in soil beneath and around ensiled crops, field heaps will be made on concrete and on soil from the same crop, at a dry matter content known to give effluent release. Effluent flow from the heap made on concrete will be measured and soils will be sampled at intervals beneath the heap using techniques developed during the earlier study. Field heaps surveyed in 1992--1993 will be revisited and samples analysed for percent dry matter content to determine the effect of season on farm practice. Data obtained from the above approaches will be drawn together and an assessment of pollution risk from field heaps will be made for different situations, based on existing knowledge of soil physical properties and underlying hydrological features. Data from the NRA (EA) on silage pollution incidents will also be taken into account. Potential pollution risks from big bale silage will be assessed using data on effluent production obtained by IGER, data on quantities of big bale silage made and the techniques employed. Results of the study will indicate the likely risk of pollution by silage effluents from silage made in field heaps and baled silage and will help formulate future government policy. It will also contribute to the understanding of effluent breakdown in soil and the likely effects of land spreading of silage effluent.
Objective
To quantify the water pollution risk from silage made in field heaps and to assess risks of pollution from big bale silage.
Time-Scale and Cost
From: 1991

To: 1996

Cost: £336,000
Contractor / Funded Organisations
ADAS UK Ltd.
Keywords
              
Fields of Study
Environmental Protection - Agriculture