The role of boron and zinc has been recognized in crop_________________?

A. World trade organization
B. Western training organization
C. World trade order
D. non of there

A. Sustainable agriculture
B. Improve agriculture
C. Both a and b

A. 43560 Sq ft in an acre
B. 40560 Sq ft in an acre
C. 46560 Sq ft in an acre
D. 47560 Sq ft in an acre

A. 11 Barrages
B. 19 Barrages
C. 25 Barrages
D. 41 Barrages

A. 5-20 Kg
B. 2-3Kg
C. 5-7 Kg
D. 20-25 Kg

A. 1970
B. 1968
C. 1971
D. 1978