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BIOLOGY

JAMB 2012 - Question 36

Biology 2012 JAMB Past Questions - Question 36: An indigenous method of renewing and maintaining soil fertility is by

Choose the most appropriate option for the gap .

An indigenous method of renewing and maintaining soil fertility is by

A: clearing farms by burning

B: xplanting one crop type

C: adding inorganic fertilizers yearly

D: crop rotation and shifting cultivation

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Correct Answer

Explanation

Crop rotation is the growing of several crops on different plots or portions on a farmland in a definite order on a yearly basis. Shifting cultivation is the growing of crops on a piece of land for one year or season and the land is left to fallow for some years to restore lost fertility before the land is cultivated again. Option D is an innovation in agricultural practice in order to match food production with population explosion. Burning of farmland destroys soil fertility.