An Introduction to Agricultural Geography by David Grigg

By David Grigg

Using approximately 1/2 the world's crew, agriculture is obviously of significant financial and social significance. an enormous number of equipment are used globally; the Western international has the newest clinical and business developments at its disposal, but within the Thrid global a dwelling is made utilizing instruments that experience rarely replaced in thousand years. An advent to Agricultural Geography presents an in depth consultant via this different and increaslingly vital 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 influence of farming upon the surroundings, the writer has produced a tremendous introductory textual content that's topical, incisive and eventually necessary to succeed in an realizing of the impressive range of the world's significant undefined.

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As hay yields can be shown to berelated to effective transpiration, Wales and western England have advantages over eastern England in producing grass. However this differenceneeds some qualification. Although the uplands of the north and west lose few days in the growing season due to moisture deficit, high rainfall givespoor quality grass (see below, pp. 51–3) so that the distinction between eastand west refers only to the lowlands. 11 The number of grass-growing days in England and Wales. ), Climatic Factors and Agricultural Productivity, University College of Wales, Aberystwyth, Memorandum No.

The essence of successful farming is to find a way to harvest crops, which removes nutrients, while maintaining the soil-plant nutrient status. AN INTRODUCTION TO AGRICULTURAL GEOGRAPHY 45 FARMING SYSTEMS AND FERTILITY When natural vegetation occupies an area, there is a cycle of plant nutrients between the soil and the vegetation with little or no loss from the system; soil and vegetation are in equilibrium. Man can collect the fruits and nuts, but this requires no modifications. Once the vegetation is removed then some means of restoring fertility must be found.

A small part of the forest is cleared, and the trees and lianes burnt. A variety of crops including cereals, roots and bushes is planted intermixed in the clearing, protecting the soil from high temperatures. After two or three years weeds become difficult to remove and crop yields fall. The tribe move their huts to another area and repeat the process. The original clearing is colonized by bush and, later secondary forest. After twenty years or more the vegetation has restored the soil fertility, and it can be cropped again.

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