'Akiochi' disease in rice is due to the toxicity caused by
A. Lead
B. Iron
C. Phosphorus
D. Hydrogen sulphide
Answer: Option D
A. Lead
B. Iron
C. Phosphorus
D. Hydrogen sulphide
Answer: Option D
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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