Write four advantages of using biofertilisers in Agriculture.

Explanation

Biofertilisers are micro-organism which enrich the fertility of the soil. e.g., Rhizobium bacteria, Cyanobacteria like Anabaena.
Advantages of Biofertilizers.
(i) Biofertilizers do not pollute soil, ground water or surface water.
(ii) Crop yield is increased by 15-35%.
(iii) Number of soil borne pathogens decrease.
(iv) They release growth promoting chemicals.
(v) Biofertilizers maintain the crumb structure of the soil.
(vi) They are low cost formulations which can be prepared by the farmers themselves.
(vii) They do not change the pH of the soil.
(viii) They are useful in all types of soil conditions.