Biuret in urea applied as a foliar spray in citrus fruits should not be more than
A. 0.25%
B. 0.50%
C. 1.75%
D. 1.50%
Answer: Option A
A. 0.25%
B. 0.50%
C. 1.75%
D. 1.50%
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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