Question

Which of the following is a method used to prevent soil depletion?

a-Adding fertilizers
b-Planting grasses on slopes
c-dune fences

Answer 1

The correct answer is option (B) planting grass on the slopes.

The soil depletion can be prevented by adding grasses and smaller plants on the slopes. It keeps the soil intact and prevent the soil from getting erode or blown away.

The fertilizers may decrease the quality of the soil due to the presence of the chemicals,, also, the fertilizers are added to enhance the growth of the crop. The dune fences are used to prevent the sand flow in the deserts, it helps in decreasing the shifting of the sand mass due to wind.

Answer 2

Answer is option b which is planting grasses on slopes.
Planting grasses on slopes is a method used to prevent soil depletion. The method of Planting grass across the slope is known as Contour Farming. It can reduce soil erosion by 50 percent as compared to the farming up and down hills. It is practiced in many parts of the world where farming is important.