Answer:
Preventive measures of soil erosion are
(i) A forestation Planting more trees reduces soil erosion.
(ii) Contour Ploughing Ploughing land in furrows across
the natural slope of the land helps to trap water and prevent the washing away
of top soil along with it.
(iii) Step (terrace) Farming Farmers form a series of steps
by making horizontal strips supported by walls to catch the descending water.
It gives the water sufficient time to percolate into the soil and nourish the crop.
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