Which of the following does not come under the category of ‘secondary nutrient’ for plant growth ?

Related Mcqs:

Raw materials for nitric acid manufacture are___________________?

A. Hydrogen peroxide, air and water B. Anhydrous ammonia and air C. Anhydrous ammonia, air and water D. Wet ammonia, air and water...

Lower temperature and large excess of ammonia in urea melt__________________?

A. Increases biuret formation B. Decreases biuret formation C. Is undesirable D. Does not effect biuret formation...

Catalyst used in ammonia synthesis uses ____________ as a promoter?

A. Pt B. K2O C. Al2O3 D. Ni...

Ammonium sulphate fertiliser is __________________?

A. The highest concentration nitrogenous fertiliser B. The best fertiliser for paddy C. A basic fertiliser D. A neutral fertiliser...

Base suspension fertiliser essentially contains___________________?

A. 13% N2 and 43% P2O5 B. 43% N2 and 13% P2O5 C. 43% N2 and 13% K2O D. 43% K2O and 43% P2O5...