Define the following terms:
Which one of the following nutrients is not available in fertilizers?
In agricultural practices, higher input gives higher yield. Discuss how?
Among the given options, which one is not correct for the use of large amount of fertilisers and pesticides?
Find out the correct sentence about manure (i) Manure contains large quantities of organic matter and small quantities of nutrients. (ii) It increases the water holding capacity of sandy soil. (iii) It helps in draining out of excess of water from clayey soil. (iv) Its excessive use pollutes environment because it is made of animal excretory waste.
Fertile soil has lots of humus. Why?
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