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प्रश्न
How does excessive irrigation lead to soil salinity ?
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उत्तर
Excessive irrigation leads to soil salinity as it causes water logging. The evaporation of excess water concentrates salt at the soil surface. This causes an increase in the soil salinity. The crops die as the roots of the crop plants have limited access to oxygen and increased salinity.
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संबंधित प्रश्न
Why are manures and fertilizers used in fields?
What are advantages of using manure ?
Give a short account of biofertilizers.
Explain advantages of irrigation.
Explain, how efficiency of irrigation can be increased.
Distinguish between mixed cropping and intercropping.
Define intercropping. How does it differ with mixed cropping?
Write down disadvantages of crop rotation.
What is the advantage of using insect resistant varieties?
Which one is not a source of carbohydrates?
