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CBSE Class 9 Answered

<div>Define irrigation . Why is irrigation of crops essential ? Mention the harmful effects of excessive irrigation .</div>
Asked by jeffladebo | 12 May, 2015, 04:46: PM
Expert Answer
  • The process of supplying water to crop plants in fields through canals, wells, reservoirs, tube wells etc. is known as irrigation.
  • Wells, tube wells, ponds, lakes, dams, rivers and canals are some of the sources of irrigation.

Need for irrigation:

  • To make the soil soft due to which ploughing of fields can become easier
  • To provide moisture for germination of seeds
  • To maintain the moisture of soil for healthy crop growth
  • For the absorption of nutrient elements by the plants from the soil
  • To protect crop plants from hot air currents as well as frost

Harmful effects of excessive irrigation:

  • Excess of water in soil leads to water logging
  • Sometimes, it inhibits the process of germination
  • Roots do not grow properly in a standing water field
  • Excess irrigation destroys standing crops
  • Increases the amount of salt on the surface soil as water evaporates
Answered by Sheetal Kolte | 12 May, 2015, 05:20: PM
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