The failure of crops is often attributed to the impoverishment of land brought in by continuous cropping or by precarious rainfall.But many of the cultivators are still not aware of the fact that soil of the plant food.moisture ,etc.The perpetual drain on soil by erosion depletes the land gradually of the soil fertility.When the soil eroision is long and continuous,even the skeleton of the soil-body is not left over in the land.When such a stage in reached.the soil completely loses its capacity to produce crops. The exact loss by soil erosion is beyond estimation.However according to estimate made in United States of America.Erosion steals 21times as much plantfood as the crops take out of the land!The soil erosion not only steals the plantfood but also changes the physical condition.With changes in the phisial condition,water holding capacity of the soil,under ground drainage and supply of under ground water also change.All these changes eventually bring down the crop yield and bring the soil to the starving condition.
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