Irrigation leads to land degradation because it leads to
(a) Diffusion of iron in crystalline and metamorphic rocks.
(b) water logging that increases salinity and alkalinity in the soil.
(c) Huge quantity of dust that settles down on the land.
(d) Intense leaching
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Over irrigation is responsible for land degradation due to water logging which leads to increase in salinity and alkalinity in the soil. ... It retards the process of infiltration of water into the soil after it settles down on the land.
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