خيارات البحث
النتائج 211 - 220 من 225
Physiognomical polar variations of marine phanerogames areas in the marine reserve of miramare (Trieste)
1996
Bressan, G. (Trieste Univ. (Italy). Dipt. di Biologia) | Odorico, R.
Pollution of the Mediterranean Sea
1996
Nicolaou, M. L. (Michael L) | Andreadakis, A. D.
Royal Commission on Environmental Pollution | Sustainable use of soil
1996
Conference proceedings, International Conference on Air Pollution from Agricultural Operations
1996
[Registration and analysis of impacts of air pollution in forest ecosystems, demarcation against other possible causes for the new kind of forest decline. Pt.1: Forest ecosystem research in the ARINUS-areas]
1996
Kaendler, G.
[Registration and analysis of impacts of air pollution on forest ecosystems, demarcation against other possible causes for the new kind of forest decline. Pt.2: Research projects outside the ARINUS-areas]
1996
Bittlingmaier, L.
Control of water pollution from agriculture
1996
Ongley, E. D.
Contracting for non-point-source pollution abatement
1996
Byström, Olof | Bromley, Daniel W.
Reducing diffuse pollution through implementation of agricultural best management practices: a case study
1996
Cook, M.G. | Hunt, P.G. | Stone, K.C. | Canterberry, J.H.
A system of agricultural best management practices (BMPs) was implemented on a 2,100 ha watershed in Duplin County, North Carolina, USA, for the purpose of improving water quality. The BMPs included: Nutrient, pest, and animal waste management; and soil conservation practices. Both surface and ground water were continually analyzed to assess the water quality impacts. Nutrient management plans have been developed for over 80% of the cropland. Pest management plans have been developed for over 60% of the cropland. Over one-half of all plans have been implemented. Poultry mortality composting and improved swine waste management have decreased the potential adverse effects of animal operations. A constructed wetland shows promise as a pre-treatment of swine waste prior to land application. Stream monitoring shows decreasing amounts of nitrate- and ammonium-nitrogen in the surface waters of the watershed. Ground water monitoring shows relatively high concentrations of nitrate in areas of intensive swine and poultry operations. Ground water monitoring of pesticides reveals low levels of alachlor, atrazine, and metolachlor even though large amounts of these chemicals are used on crops. The successful implementation of agricultural BMPs appears to be having a positive effect on water quality. Both stream and ground water monitoring will be continued for several years to assess more definitively the changes in water quality.
اظهر المزيد [+] اقل [-]The contributions of science to integrated coastal management
1996
