The term 'contingent cropping' means
A. Crops grown to achieve more soil fertility
B. Crops grown for protecting weather condition
C. Crops grown to maintain soil fertility
D. Crops grown to achieve nutritive production
Answer: Option B
A. Crops grown to achieve more soil fertility
B. Crops grown for protecting weather condition
C. Crops grown to maintain soil fertility
D. Crops grown to achieve nutritive production
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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