A. alkaline soils

B. acidic soils

C. neutral soils

D. sodic soils

A. high cation exchange capacity

B. high % base saturation

C. high sand content         

D.  significant amounts of clay present

A. infiltration

B. Leaching 

C. Percolation

D. Seepage 

A. S

B. P

C. Ca 

D. Mg

A. 1-4 %

B. 1-0.4 %

C. 1-5 %

D. 0.2-1.0 %

A. Granulation

B. Tillage

C. Tilth

D. All the above

A. Water

B. Petrol

C. Soil

D. Gas

A. CO (NH₂)₂

B. NH₂-CO-NH-CO-NH₂

C. (NH₄)₂CO₃

D. None of these

A. Algae  

B. Bacteria

C. Fungi  

D. Microorganism

A. Iron, manganese, copper, zinc, boron, molybdenum, chlorine and cobalt are called micronutrients.

B. Nitrogen, phosphorus and potassium are primary nutrients

C. Calcium, magnesium and sulphur are secondary nutrients 

D. Nitrogen is converted into nitrate by earthworms