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UPSC Prelims 1979 · Agriculture · Soils
A recent (1979) discovery of a method of reducing salination of soil is
- (a) Spreading of husk on the soil
- (b) Extensive use of fertilizers
- (c) Intensive use of fertilizers
- (d) None of the above
Show the answer and explanation
Answer: (a) Spreading of husk on the soil
Spreading husk (organic mulch) was reported to reduce salinity by improving drainage and cutting evaporation.
Why the others are wrong
(b) Fertilisers can worsen salinity.
(c) Fertilisers can worsen salinity.
The trap
None — an old current-affairs item.
🔒 Salinity fixes today: gypsum, drainage, salt-tolerant varieties (CSSRI Karnal).