Which of the following strain is used for biological nitrogen fixation in soybean
A. Rhizobium trifoli
B. Rhizobium meliloti
C. Rhizobium japonicum
D. None of these
Answer: Option C
A. Rhizobium trifoli
B. Rhizobium meliloti
C. Rhizobium japonicum
D. None of these
Answer: Option C
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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