Question

How does excessive irragation lead to soil salinity?

Answer 1

Answer:

Over-irrigation increases the soil salinity due to the excessive amount of salts in the water.

Explanation:

The soil salinity increases when fresh water with dissolved minerals is applied to the same land with a high rate of evaporation. This cause the rise in water-tables that bring the salts to the roots of the plants and affect the soil structure and overall growth of the plant badly.

Answer 2

Answer:

Irrigation salinity occurs due to increased rates of leakage and groundwater recharge causing the watertable to rise.

• Rising watertables can bring salts into the plant root zone which affects both plant growth and soil structure. ... This causes potentially very high salinisation rates.