Question

EXERCISES A. Answer in Detail
1. How is soil formed?
2, List the differences between sandy soil and clayey soil.
3. Make a labelled diagram showing soil profile.
4. Give the differences between top soil and subsoil.
5. How are living organisms important for improving soil fertility?
6. Write a note on soil and crops.
7. How can soil erosion be prevented?
8. how can you show or find out the following ;-


(a) The presence of living organisms in a soil

(b) The presence of water in soil
(c) The amount of water (moisture content) present in soil

(d) The presence of particles of different sizes in soil

(e) The percolation rate of water in a soil
(f) The amount of water absorbed by soil


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Answer 1

a)Soil minerals form the basis of soil. They are produced from rocks (parent material) through the processes of weathering and natural erosion. Water, wind, temperature change, gravity, chemical interaction, living organisms and pressure differences all help break down parent material

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