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The Influence of Sewage Sludge Application on Physical and Biological Properties of Soils - Proceedings of a Seminar organized jointly by the Commission of the European Communities, Directorate-General for Science, Research and Development and the Bayerische Landesanstalt fur Bodenkultur und Pflanzenbau, Munich, Federal Republic of Germany, held in Munich, June 23-24, 1981 (Paperback, Softcover reprint of the original 1st ed. 1983)
Loot Price: R1,530
Discovery Miles 15 300
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The Influence of Sewage Sludge Application on Physical and Biological Properties of Soils - Proceedings of a Seminar organized jointly by the Commission of the European Communities, Directorate-General for Science, Research and Development and the Bayerische Landesanstalt fur Bodenkultur und Pflanzenbau, Munich, Federal Republic of Germany, held in Munich, June 23-24, 1981 (Paperback, Softcover reprint of the original 1st ed. 1983)
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The agricultural value of sewage sludges is well known and a lot of
published data has demonstrated the positive effects of sludge
appli cations on plant growth and yield. These effects are probably
due mainly to the nitrogen and phosphorus content of sewage
sludges. But, as sludges are more organic than mineral, we can
expect an effect of the organic matter added to the soil on soil
fertility. Certainly, in the future, landspreading of sludges will
be regulated, taking into account pollution hazards for waters
(excess of nitrogen and phosphorus supply compared to plant needs
and soil storage capacities) and for soils (excess of heavy metals
supply and build up in soils). There will be regulations fixing
what low level of sludges may be spread each year, decreasing their
comparative value with respect to mineral fertilizers. In this
eventuality, the organic value of sludges will take on a greater
importance and several questions arise: - what is the lowest amount
of sludge to be spread to have an immediate effect on soil physical
properties? - are sludges effective on soil physical properties
when spreading repeated low amounts? On the other hand, organic
matter and soil biology are closely linked and there are few data
on the possible effects - beneficial or detrimenta- on soil
organisms."
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