A. Titanium oxide 

B. Nitrogen

C. Zinc 

D. Iron

A. C, O, N

B. O, H, C

C. O, H, N

D. none of the above

A. only one nutrient

B. more than two nutrients

C. two nutrients

D. all the three

A. Nitrification

B. Ammonification

C. Mineralization

D. Immobilization

A. clay

B. silt

C. sand

D. all the three

A. CaCO₃

B. Fe/Al oxides

C. Organic matter

D. 2:1 type clay minerals  

A. Nitrogen

B. Phosphorus

C. both a & b

D. none of these

A. N, P, Ca.

B. N, K, P

C. P, K, S

D. all of the above

A. Molybdenum

B. Copper

C. Chloride

D. Cadmium

A. an element which a plant must have in order to complete its life cycle.

B. anything which the plant takes up from the soil.

C. nutrients which animals get when they eat plants

D. all of the above