Download e-book for kindle: An Introduction to Agricultural Geography by David Grigg

By David Grigg

ISBN-10: 0203308255

ISBN-13: 9780203308257

ISBN-10: 0203419278

ISBN-13: 9780203419274

ISBN-10: 0415084423

ISBN-13: 9780415084420

Utilising approximately half the world's crew, agriculture is obviously of serious financial and social significance. a massive number of tools are used globally; the Western international has the most recent clinical 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 advent to Agricultural Geography offers an intensive advisor via this varied and increaslingly very important geographical topic, aiming to teach wide variety of things clarify how agricultural practices range from position to put. facing the actual setting, monetary behaviour and calls for, institutional and social affects 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 achieve an knowing of the outstanding variety of the world's significant undefined.

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Sample text

Good soils—those which are deep, well drained, neutral and retain sufficient soil moisture for crop growth—are not common. In England and Wales, only 17 per cent of the improved agricultural land is without moderate or severe limitations, and only in eastern England is a high proportion of land in this category. On a world scale, a mere 11 per cent of the total land area is without marked limitations to crop growth, while only 24 per cent of the total area is thought to be capable of growing crops at all.

There are twenty-one crops that occupy 1 per cent or more of the harvested area of at least one of the seventeen countries. The principal food crops are cereals, millet, sorghum, rice and maize. Root crops such as manioc, cocoyams, sweet potatoes and yams are also CLIMATE AND CROPS 37 important locally. Perennial cash crops include rubber, tea, coffee, oil-palm, coconuts and sugar-cane, while pulses, groundnuts, cotton and soybeans are also grown. There are, however, variations in the distribution of each crop, and particularly in the diversity of crops grown.

Chapter 4 Soils and the farmer Soil has been succinctly described as ‘the stuff plants grow in’. It provides not only the material for the plants’ roots to grow in, but the water essential for transpiration and most of the sixteen chemical elements necessary for growth and development. Soils vary considerably in their characteristics—in structure, depth, texture, plant nutrient content and acidity—and this affects both the range of crops that can be grown, and the level of crop yields which can be reached.

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An Introduction to Agricultural Geography by David Grigg


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