Download Agricultural Chemicals and the Environment (Issues in by Hester, Rsc, R. Harrison PDF

By Hester, Rsc, R. Harrison

Huge, immense raises in agricultural productiveness can thoroughly be linked to using chemical substances. This assertion applies both to crop construction by using fertilizers, herbicides and insecticides, as to farm animals creation and the linked use of gear, steroids and different progress accelerators. there's, even though a dismal part to this photo and it's important to stability the advantages which stream from using agricultural chemical compounds opposed to their environmental affects which occasionally are heavily disadvantageous. Agricultural chemical compounds and the surroundings explores various matters which at the moment are topic to wide-ranging debate and are of shock not just to the medical institution and to scholars, but in addition to farmers, landowners, managers, legislators, and to most of the people.

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Example text

When nitrate concentrations increased in natural waters, the EC introduced the 50 g m\ limit for nitrate in potable water in 1980, thereby putting the onus for solving the problem on farmers and water suppliers. It should perhaps have reviewed the Common Agricultural Policy at the same time. The UK became a member of the Community in 1973 and came under the Common Agricultural Policy as a consequence. This had a dual effect on the use of nitrogen fertilizer. Better prices for crops made it economic to use more nitrogen.

Hart and D. S. Jenkinson, J. Agric. , 1993, 121, 363. 24 Fertilizers and Nitrate Leaching systems the farmer needs to think very hard before applying much more than 220—250 kg ha\ of nitrogen fertilizer. The Politics of the Nitrate Problem The farmer has inevitably been blamed for most of the nitrate problem, but we should not forget the contribution of the politician. The Treaty of Rome, signed in 1957, committed the six founder members of the European Community to the Common Agricultural Policy, and thence to the expansion of agricultural production and productivity through the provision of a guaranteed market for produce.

Fast, in Destratification of Lakes and Reservoirs to Improve Water Quality, ed. F. L. Burns and I. J. Powling, Australian Water Resources Council, Canberra, 1981, p. 515. 38 Eutrophication of Natural Waters and Toxic Algal Blooms There is some controversy about the use of this technique in terms of its efficacy and, although it may be attractive in terms of costs, there are few lakes in the UK which are deep enough to warrant its use. Bio-remediation The recent increase in the understanding of biological processes in lakes has led to the development of ‘ecotechnical methods’ of manipulating the trophic status of lakes.

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