Which of the following is not an effect of over-graing on soil?

A. Improvement of soil structure

B. soil compaction

C. exposure of soil to erosion

D. depletion of soil nutrients

The major factor affecting distribution of crops in West Africa is

A. climate

B. soil

C. topography

D. disease

Nutrient replenishment in soil can be enhanced by

A. crop removal

B. leaching

C. erosion

D. crop rotation

What is the function of nitrosomonas bacteria in the nitrogen cycle?

A. Ammonification

B. Nitrification

C. Denitrification

D. Nitrogen fixation

A mass of decayed plant and animal wastes processed in pits is referred to as

A. green manure

B. farmyard manure

C. compost manure

D. inorganic manure

A major disadvantage of monoculture is that

A. soil texture is destroyed

B. soil microbes are destroyed

C. diseases and pests build up

D. farms cannot be mechanized

Which of the following pairs of farming systems uses bush fallowing?

A. crop rotation and land rotation

B. shifting cultivation and land rotation

C. land rotation and mixed farming

D. crop rotation and monoculture

Continuous soil tillage could lead to

A. increased infiltration of water .

B. reduced run-off

C. break down of soil structure

D. improved soil texture

A bag of fertilizer has a ratio of 10:0 written on it. This means that the fertilizer is a

A. lime fertilizer

B. nitrogenous fertilizer

C. phosphate fertilizer

D. potassium fertilizer

Theobroma cacao grows best in the

A. sudan savannah zone

B. humid rain forest zone

C. mangrove swamp forest zone

D. northern guinea savannah zone