Fertilizers and environment: proceedings of the International Symposium "Fertilizers and Environment", held in Salamanca, Spain, 26-29, September, 1994
Food production remains the highest agricultural priority, subject to the constraint that it be done in harmony with nature, or at least with minimum environmental pollution. The amount of fertilizer applied can be controlled using modern application techniques, including soil and crop management, guaranteeing higher economic profit and lower environmental cost. It is in such a context that the present book addresses the efficient and rational use of mineral and organic fertilizers while preserving environmental quality. The book discusses the impact on surface and groundwaters, soils and crops, and experience of nitrate leaching, denitrification, ammonia volatilization, heavy metal pollution, agricultural and urban waste management, and international and national legislation. Audience: Agronomists, environmentalists, soil and food chemists, ecologists, policy makers, and managers in the fertilizer industry concerned with the trend of public opinion.
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The present situation of fertilizer production and use in the world
2 Higher and better yields with less environmental pollution in Egypt through balanced
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1996 Kluwer Academic accumulation acid agricultural ammonium amount application average biomass biosolids cadmium cation Cd concentration chemical chernozem compost crop decrease denitrification doses dry matter effect efficiency environment environmental etal experiment fertiliser field grain yield growth harvest heavy metals higher increase irrigation Key words kg ha-1 kg N ha-1 kg N/ha kg/ha Kluwer Academic Publishers land legumes levels losses lysimeters maize manure method mg kg-1 mg/kg micronutrients mineral fertilizers N-fertilizer Ndff Netherlands nitrate leaching nitrification nitrogen fertilizer nitrogen fixation nodule nutrient nutrient solution nutrition organic fertilizers organic matter phosphate phosphorus plant plots pollution potassium production rates reduced residues root runoff sewage sludge shoots showed significant significantly slurry soil fertility soil samples soybean Spain Sulphur superphosphate surface band t/ha Table tillage tion toxicity treatments uptake urea values vermicomposting wastewater wheat