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David Grigg's An Introduction to Agricultural Geography PDF

By David Grigg

ISBN-10: 0203308255

ISBN-13: 9780203308257

ISBN-10: 0203419278

ISBN-13: 9780203419274

ISBN-10: 0415084423

ISBN-13: 9780415084420

Using approximately half the world's crew, agriculture is obviously of serious monetary and social value. an immense number of equipment are used globally; the Western global has the newest medical and commercial developments at its disposal, but within the Thrid global a residing is made utilizing instruments that experience not often replaced in thousand years. An creation to Agricultural Geography offers an intensive advisor via this assorted and increaslingly vital geographical topic, aiming to teach wide variety of things clarify how agricultural practices range from position to put. facing the actual surroundings, fiscal behaviour and calls for, institutional and social impacts and the influence of farming upon the surroundings, the writer has produced a huge introductory textual content that's topical, incisive and eventually necessary to achieve an realizing of the extraordinary variety of the world's significant undefined.

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Sample text

The difference was equally marked in 1870, when reliable agricultural statistics were first available, and was probably as clear in earlier periods. The predominance of grass in the west, and its lesser importance in the east and south, can partly be related to differences in environment. B. Grigg, The Harsh Lands, London, Macmillan, 1970 summer, and hay and silage for winter feed. 6°C, so that the growing season is longer in the west and south than in the north and east, and longer in lowland than in upland regions.

Thus, the cultivation of some crops — notably barley and spring wheat—which had been profitable in the north ceased to be so, and it is this that accounted for the southward retreat. Varjo, ‘Productivity and fluctuating limits of crop cultivation in Finland’, Geographica Polonica, 1979, vol. 40, pp. Wiesner, Climate, Irrigation and Agriculture, Sydney, Angus and Robertson, 1970, p. 90 MOISTURE Soil moisture is essential to plant growth for without water plants wilt and the, and plant nutrients cannot be taken up by the crop.

Many of these variables, all critical for successful plant growth, can be modified by the farmer; in dry regions irrigation can supplement precipitation, fertilizers can add plant nutrients and temperature and day-length can be modified by growing crops indoors with heating and controlled lighting. But all these modifications of the natural environment are costly. There are, however, some parts of the earth’s surface where a particular crop will grow best without these modifications, and a knowledge of such places helps to explain the distribution of crops.

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An Introduction to Agricultural Geography by David Grigg

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