Continuous variation in atmospheric pressure is recorded by
A. Thermograph
B. Barograph
C. Thermometer
D. Hydrograph
Answer: Option B
A. Thermograph
B. Barograph
C. Thermometer
D. Hydrograph
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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