Major contribution in green house gases is

H.A.N.P. V. is used for the biological control of

Which one of the following scientist defined the criteria of essentiality of nutrients in plants?

Premature leaf fall of apple is caused by

Common polyphagus crop pests are:

A. Desert locust, Schistocerca gregaria (Forskal)

Phenyl mercuric acetate (PMA) is a ______ of antitranspirant.  

Which of the following fish is known for bubble nest building during breeding?

Blossom end rot in tomato is due to deficiency of ___

The branch of agriculture which deals with the principles and practices of crop production and field management is called ...........................?

Judicious removal of plant part to obtain better and qualitative yield is termed as 

Choose the correct statements:

(A) Naphtha is a fraction of petroleum.

(B) Percolation is downward movement of water through soil.