3. What do you understand by soil erosion? How can the soil be conserved?
4.
What do you understand by soil exhaustion? What measure can be taken to prevent soil exhaustion?
Answers
3.)Soil erosion is a continuous process that occurs either slowly or at an alarming rate. It results in a continuous loss of topsoil, ecological degradation, soil collapse, etc.
Prevention of soil erosion is also called conservation of soil.
i) Plant trees on barren lands to limit erosion of soil.
ii) Add mulch and rocks to prevent the plants and grass underneath to prevent soil erosion.
iii) Mulch matting can be used to reduce erosion on the slopes.
iv) Put a series of fibre logs to prevent any water or soil from washing away.
v) A wall at the base of the slope can help in preventing the soil from eroding.
vi) Every household should have a proper drainage system so that water flows down into proper water collecting systems.
4)Soil exhaustion occurs when poorly managed soils are no longer able to support crops or other plant life. Soil exhaustion has consequences beyond limited food production; it also increases risk of soil erosion.
Measures to be taken :-
i) No pesticides, artificial fertilisers and soil improvers may be used.
ii) Natural and environmentally friendly cultivation must be used.
iii) Natural crop rotation is used to avoid soil exhaustion.
iv) Green manures and composting must be used to maximise soil production capacity.
Answer:
the above mentioned answer is correct!