How much quantity of total incoming solar radiation is absorbed by the soil and can be used to warm it
A. 10%
B. 20%
C. 32%
D. 40%
Answer: Option A
A. 10%
B. 20%
C. 32%
D. 40%
Answer: Option A
Sources of negative charges on silicate clays is/are
A. Exposed crystal edges
B. Isomorphus substitution
C. Anion exchange
D. All of these
The most conspicuous chemical change that take place when soil is flooded is reduction of
A. Fe
B. P
C. S
D. None of these
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