By David Grigg
Applying approximately half the world's crew, agriculture is obviously of serious monetary and social value. a big number of tools are used globally; the Western global has the most recent clinical and business developments at its disposal, but within the Thrid international a residing is made utilizing instruments that experience not often replaced in thousand years. An creation to Agricultural Geography presents an intensive advisor via this diversified and increaslingly very important geographical topic, aiming to teach wide variety of things clarify how agricultural practices fluctuate from position to put. facing the actual surroundings, fiscal behaviour and calls for, institutional and social impacts and the impression of farming upon the surroundings, the writer has produced a big introductory textual content that's topical, incisive and eventually necessary to succeed in an realizing of the notable range of the world's significant undefined.
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Extra info for An Introduction to Agricultural Geography
Chemical fertilizers Inorganic fertilizers have been widely used in traditional farming systems. Thus bones have been crushed to give phosphorus, and clays have been mixed with sands to improve texture and add potassium. The modern fertilizer industry dates back to the 1840s, but it was not until after the Second World War that fertilizer production became cheap enough to allow its intensive use. The consumption of fertilizers has greatly increased in all parts of the world since 1945, but particularly in Europe and European settled areas.
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.
Livestock are everywhere used to provide the manure, but particularly in Europe. In medieval farming systems much of the manure was deposited upon the common grazing land, and only on arable crops when cattle were grazed on the straw left standing after harvest. However, in the nineteenth century and in the first half of the twentieth century, cattle were fed in stalls and their dung mixed with straw. Farmyard manure, which contains nitrogen, potassium and phosphorus, was sufficient to maintain cereal yields at quite a high level.