tailieunhanh - SOIL EROSION AND CONSERVATION THIRD EDITION

Soil erosion is a hazard traditionally associated with agriculture in tropical and semi-arid areas and is important for its long-term effects on soil productivity and sustainable agriculture. It is, however, a problem of wider significance occurring additionally on land devoted to forestry, transport and recreation. Erosion also leads to environmental damage through sedimentation, pollution and increased flooding. The costs associated with the movement and deposition of sediment in the landscape frequently outweigh those arising from the long-term loss of soil in eroding fields. Major problems can result from quite moderate and frequent erosion events in both temperate and tropical climates. Erosion control is a necessity in almost.

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