On more than six hundred sites in the UK West Midlands, where water erosion was recorded by the writer during the years 1967–76, soil compaction and down-slope cultivation lines were identified as major contributory factors in over 95% of cases. Such cultivations should be avoided where possible, susceptible soils should not be left fallow longer than necessary, and field operations should be kept to the minimum when the upper layers of the soil are too moist.
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