(i) Is useful in areas having thin; infertile and dry soils. |
(ii) Can regulate pH optimum for a particular crop. |
(iii) Increases labour cost. |
(iv) Increases problem of weeding. |
A) (i),(ii) and (iii)
B) (i) and (ii)
C) (ii) and (iv)
D) (i) and (iii) .
Correct Answer: B
Solution :
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