Models to Assess the Susceptibility of Soils to Excessive Compaction

Compaction of soil has become a problem of worldwide concern because of (1) larger tractors, tillage, and harvesting equipment; (2) increases in intensive cropping practices; and (3) new lands being brought into cultivation, particularly in the tropics. According to McKibben (1971), between 1948 and 1968 the average weight of tractors increased from 2.7 to 4.5 tons. At present, the average is 6.8 tons, with larger units weighing more than 22.4 tons.

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