Soil Erosion
Soil Erosion
Soil Erosion:
Sometimes, wind and water remove the fertile top soil reducing the productivity of the soil in that area. This removal of soil by running water and wind is known as soil erosion. Generally, the rate of removal of fine particles from the surface is the same as the rate of formation of soil. But sometimes, disturbance in this balance, usually man-made leads to a greater rate of removal of soil. Hydroponics is a technique leads to a greater rate of removal of soil, with the help of which plants are grown in mineral nutrient solutions not soil. The major causes of soil erosion are:
Natural Causes of Soil Erosion:
1. High wind velocity over lands, which have no vegetation, carries away the loose top soil.
2.Pouring raindrops, over areas with no or very little vegetation. also carries away the top soil.
Which of the following are correct : (a) The roots of plants and trees firmly bind the particles of soil together. (b) In some soils the water-holding capacity is high, whereas in others it is low. (c) Soil with low water-holding capacity is swept away by air or water easily. | |||
| Right Option : D | |||
| View Explanation | |||
Two effects of soil erosion are: | |||
| Right Option : A | |||
| View Explanation | |||
Removal of fertile layer of soil is known as ___________________ | |||
| Right Option : A | |||
| View Explanation | |||
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