1.
An example of inorganic fertilizer is
compost.
farmyard manure.
green manure.
urea.
2.
Living organisms which help to modify the physical and chemical composition of the soil are
I. earthworms.
II. lichens.
III. bacteria.
I and II only
I and III only
II and III only
I, II and III
3.
Crop residue left on farms to conserve soil moisture are referred to as
waste materials.
stable mulch.
hay.
silage
4.
An important function of organic matter in the soil is to
improve texture of the soil.
control harmful bacteria in the soil.
serve as a mulch.
supply both micro and macro nutrients.
5.
Terracing checks soil erosion by
alternating strips of grass-covered ground.
reducing speed of run-off water.
increasing speed of run-off water.
increasing slope of water flow.
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