Agriculture, Hydrology and Water Quality by Philip Haygarth, Steven C Jarvis

By Philip Haygarth, Steven C Jarvis

This ebook is a set of cutting-edge experiences at the worldwide difficulties of diffuse water pollutants from agriculture, which impacts the water caliber of rivers, lakes, reservoirs and the oceans. It contains chapters on eutrophication, phosphorus, nitrogen, manure, heavy metals, carbon/persistent natural pollution and soil/siltation difficulties. The e-book is damaged down into 3 components and displays the evaluations of the world's specialists in those matters.

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1995). , 1991).

Royal Society of Chemistry, Cambridge, pp. 228–239. D. V. (1993) Improving the use of nitrogen in brassica rotations. Acta Horticulturae 339, 207–218. R. and Botterweg, P. (1997) Economics–ecology modelling – the case of nitrogen. , Simonsen, J. and Vatn, A. (eds) Controlling Mineral Emissions in European Agriculture. Economics, Policies and the Environment. CAB International, Wallingford, UK, pp. 225–248. R. A. (1984) Nitrate leaching from grassland. Nature 311, 50–53. , Hawkins, J. C. (1993) Nitrate leaching from grazed grassland lysimeters: effects of fertilizer input, field drainage, age of sward and patterns of weather.

Kg N haϪ1 yearϪ1). , 1997). Year 1998 1999 2000 2002 2005 2008 Arable Grassland 175 300 175 300 150 275 (125) (250) (110) (200) (100) (180) Within the UK, the main practical ideas for reducing NO3Ϫ leaching have been tested voluntarily in Nitrate Sensitive Areas (NSAs) and, from December 1998, enforced in 68 Nitrate Vulnerable Zones (NVZs) covering 600,000 ha. , 2000). Limits for N application rates and on the timing of manure applications have been defined and are monitored for these zones. 10).

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