An Introduction to Agricultural Geography by David Grigg

By David Grigg

Using approximately half the world's team, agriculture is obviously of serious monetary and social significance. an immense number of equipment are used globally; the Western international has the most recent medical 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 offers an intensive advisor via this assorted and increaslingly very important geographical topic, aiming to teach wide selection of things clarify how agricultural practices vary 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 immense introductory textual content that's topical, incisive and finally necessary to achieve an figuring out of the extraordinary range of the world's significant undefined.

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Modern grain production requires the use of machinery which, however, cannot be economically employed upon small farms. Nor can such machines be easily used in areas with steep slopes; eastern England has larger areas of level land than the west or Wales. Grain production has other drawbacks on the small farm. Returns per hectare are comparatively low; while the occupier of a large farm can make a good living from cereals, the farmer with less than 40 or 50 ha must choose an enterprise with greater returns per hectare.

SOIL CHARACTERISTICS AND AGRICULTURE An important characteristic of a soil is its depth. Many parts of the world suffer from too shallow soils, both in arid regions and in areas such as the Canadian Shield where glaciation has removed the soil, leaving only AN INTRODUCTION TO AGRICULTURAL GEOGRAPHY 43 bare rock. A shallow soil is often unable to carry sufficient moisture for growth, and the supply of plant nutrients may be inadequate. For some crops, shallow soils may be insufficient for root development.

58, pp. 333-6 Source: Jen-hu Chang, ‘Potential photosynthesis and crop production’, Annals of the Association of American Geographers, 1970, vol. 60, pp. 3). Some crops have a remarkable latitudinal range; of the cereals rice and maize can be grown in lowland areas on the equator, but also north of 50° in the northern hemisphere. Rye, oats, sugar-beet and potatoes are grown north of 50° latitude- in the northern hemisphere, but rarely south of 30°. However, these and other temperate crops can be grown in equatorial regions at high altitudes, where temperatures are lower than at sea level (see Chapter 5).

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