UPSC CSE Prelims
Question 28
Salinization occurs when the irrigation water accumulated in the soil evaporates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land ?
View correct answer and explanation
Correct answer: B
Correct Option: B
Explanation: Evaporation of poorly drained irrigation water leaves dissolved salts; sodium accumulation can disperse clay, clog pores and diminish infiltration.
Option-wise Analysis:
A: Incorrect - Salt stress generally damages soil quality and reduces, not greatly increases, production.
B: Correct - saline-sodic deterioration can reduce soil permeability.
C: Incorrect - A rising water table can contribute to salinisation, but is not the specific soil effect sought here.
D: Incorrect - Waterlogging fills pores with water but is distinct from salt accumulation.
Review Note: Reduced permeability is especially characteristic of sodic/saline-sodic soils; high salinity alone need not always lower permeability.