If fertiliser prices go up the optimum close should
A. Come down
B. Stay unchanged
C. Also go up
D. None of these
Answer: Option A
A. Come down
B. Stay unchanged
C. Also go up
D. None of these
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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