Compare the use of manure and fertilisers in maintaining soil fertility.
Q. Compare the use of manure and fertilisers in maintaining soil fertility.
Ans. Effect of using manures on soil quality :
(i) The manures enrich the soil with nutrients.
(ii) They provide a lot of organic matter (humus) to the soil and thus restores water retention capacity of sandy soils and drainage in clayey soil.
(iii) The addition of manures reduces soil erosion.
(iv) They provide food for soil organisms, like soil friendly bacteria.
Effect of using fertilisers on soil quality:
(i) By the continuous use of fertilisers, the soil becomes powdery and dry and the rate of soil erosion increases.
(ii) By the use of fertilisers, the organic matter decreases which decreases porosity and the plant roots do not get oxygen properly.
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