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Which of the following statements are correct statements? (a) Masonry check dams are used for controlling gully erosion and water harvesting. (b) soil cloudiness, surface roughness, roughness, soil curst and soil moisture are the main factors affecting water erosion. (c) In Agronomic measures water erosion is controlled by appropriate crops and cropping systems. (d) Stubble mulching and minimum tillage be practiced to minimise wind erosion.

Which of the following statements are correct statements? (a) Masonry check dams are used for controlling gully erosion and water harvesting. (b) soil cloudiness, surface roughness, roughness, soil curst and soil moisture are the main factors affecting water erosion. (c) In Agronomic measures water erosion is controlled by appropriate crops and cropping systems. (d) Stubble mulching and minimum tillage be practiced to minimise wind erosion. Correct Answer (a), (c) and (d) only

The correct answer is (a), (c) and (d) only.

Key Points

  • Masonry check dams constructed with cement mortar and non-disintegrating stones are generally used in torrent control.
  • The main objective of the dam is to hold fine and coarse material carried by flowing water in the gully or torrent. Hence, statement a is correct

Additional Information 

Water erosion

  • Water erosion is the removal of soil by water and transportation of the eroded materials away from the point of removal.
  • Water action due to rain erodes the soil and causes activities like gully, rill, and stream erosion leading to the downstream effects of flooding and sedimentation.
  • Water erosion is caused by the detachment and transport of soil by rainfall, runoff, melting snow or ice, and irrigation. Hence, statement b is incorrect.
  • Excessive water erosion can threaten the production of agricultural and forest products.
  • Water erosion can be controlled by appropriate crops and cropping systems. Hence statement c is correct.

Wind erosion

  • Wind erosion is a natural process that moves soil from one location to another by wind power.
  • Wind erosion is caused by the action of the wind on the soil surface and is the process by which fine soil particles are carried away.
  • Wind erosion is a serious problem in many parts of the world, especially in arid and semiarid regions.
  • It affects agricultural land in much of Northern Africa and the Near East; parts of Southern, Central, and Eastern Asia; Australia; Northwest China; Southern South America; and North America.
  • Stubble mulching and minimum tillage can be practiced to minimise wind erosion. Hence, statement d is correct.

Related Questions

Consider the following statements and choose the correct answer:
1. Control of land loss can be attempted through restoring forest and grass cover to check erosion and floods
2. Shifting cultivation can be replaced by crop rotation, mixed cropping or developing piantation crops which would improve fertility and support a large population
3. Salinity can be prevented by covering the area with appropriate plant species and by raising trees as wind breaks
4. Shifting sand can be controlled by mulching
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2. Splash erosion
3. Normal erosion
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