The most common soil mineral found in all crystalline rocks and a main constituent of granite and sandstone is

Which of the following is not an effect of grazing on the soil?

The most important factor that determines the rate of agriculture development in a country is the

The factors affecting formation of soil include the following except

Which of the following will retain the greatest amount of water?

A characteristic feature of subsistence agriculture is

The newly introduced government agricultural programme in Nigeria is

Inhibition of root and bark development, fruiting and seed formation in crops is due to the deficiency of

In underground drainage