3. Fill in the blanks:(a) Soil is formed by the breakdown of(b) The most


3.
Fill in the blanks:(a) Soil is formed by the breakdown of(b) The most fertile layer of the soil is called(c)andblow away the top layer of the soil.increases soil erosion.(d)(e) Ploughing on hill sides causes soilare cover crops.and(f)are built along river banks to prevent soil erosion.​


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