Deficiency symptoms of nitrogen occurs first on
A. Upper surface
B. Lower surface
C. Both A and B
D. None of the above
Answer: Option B
A. Upper surface
B. Lower surface
C. Both A and B
D. None of the above
Answer: Option B
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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