Which of the following is a non-metalic nutrient?
A. Calcium
B. Chloride
C. Boron
D. Magnesium
Answer: Option C
A. Calcium
B. Chloride
C. Boron
D. Magnesium
Answer: Option C
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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