Q21 of 465 Page 63

How does excessive irrigation lead to soil salinity?

Excessive irrigation causes water logging and increases surface salinity which leads to soil salinity and damage to crop plants.


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19

Explain why a legume crop does not require nitrogenous fertilizers?

 20

Why is irrigation essential?

 22

Mention three effects of excessive irrigation.

 23

Why water should be used judiciously?