An Introduction to Agricultural Geography by David Grigg

By David Grigg

Utilising approximately 1/2 the world's crew, agriculture is obviously of significant monetary and social value. an immense number of tools are used globally; the Western global has the most recent medical and business developments at its disposal, but within the Thrid international a residing is made utilizing instruments that experience infrequently replaced in thousand years. An creation to Agricultural Geography presents an intensive advisor via this various and increaslingly very important geographical topic, aiming to teach wide selection of things clarify how agricultural practices range from position to put. facing the actual setting, fiscal behaviour and calls for, institutional and social affects and the influence of farming upon the surroundings, the writer has produced an incredible introductory textual content that's topical, incisive and eventually necessary to succeed in an figuring out of the outstanding range of the world's significant undefined.

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In spring the sun’s energy is used drying-out the wet soil rather than warming it, so that the beginning of the growing season is retarded. In autumn, clay soils are difficult to cultivate in wet years (see above, p. 34). Clay soils have two advantages which, however, are of less significance under modern farming conditions. The large clay fraction slowly releases potassium so that they suffer less than other soils from potash deficiencies, and their water-retaining capacity means that they give above average yields in very dry years.

Morrison, ‘Evolution of the banana industry of Costa Rica’, Economic Geography, 1951, vol. 28, pp. 1–19. M. Jordan, ‘Trypanosomiasis control and land use in Africa’, Outlook on Agriculture, 1979, vol. 10, pp. 123–9. G. Leach, Energy and Food Production, London, IPC Press, 1976. S. Loomis, ‘Agricultural systems’, Scientific American, 1976, vol. 235, pp. 99– 105. S. A. C. ), Photosynthesis and Productivity in Different Environments, Cambridge, Cambridge University Press, 1975, pp. 145–72. S. A. E.

2). Yields are 5 tonnes per hectare, but they decline away from this zone, and eventually climate conditions are so adverse that no growth occurs and the yield is zero. This is the absolute limit of cultivation. However, farmers are not likely to cultivate the crop near the absolute limit, for economic as well as ecological factors determine where a crop is grown. Suppose the price received for the crop is £100 per tonne, and the cost of production (the same everywhere) is £150 per hectare. 2), and profit per hectare will also decline away from the optimum zone.

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