The optimum pH of soil for rice cultivation is varies in range
A. 4 - 6
B. 5 - 6.5
C. 6 - 8
D. 7 - 9
Answer: Option A
A. 4 - 6
B. 5 - 6.5
C. 6 - 8
D. 7 - 9
Answer: Option A
Downy Mildew of Bajra caused by
A. C. fusiformis
B. S. graminicola (Sclerospora)
C. T. penicillica
D. All of the above
The criteria of essentiality of nutrients in plants was given by
A. D. J. Nicholas
B. Arnon and Stout
C. J. S. Kanwar
D. M. S. Swaminathan
A. Manganese
B. Boron
C. Zinc
D. Iron
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