Role of bio fertilizers:
Widely use of fertilizers and chemical pesticides had effected in soil and water pollution. Fossil fuels like petrol and coal are employed in the manufacture of fertilizers and pesticides. To decrease pollution and over use of our non-renewable resources such as coal, petroleum, etc., a substitute method has been effectively developed to safeguard natural resources.
To keep soil fertility and soil enhancement, fertilizers of biological origin known as bio fertilizers have been developed.
Artificial inoculation of rice and another crop fields with cyanobacteria (Anabaena, Calothrix, Nostoc, Oscillatoria, Gleocapsa, Lyngbya, Scytonema) has involved much concentration to increase fertility in various countries. The word ‘bio fertilizer’ describes all the nutrient inputs of biological basis for plant growth. Biological origin considers to microbes generating nitrogen compounds. Bacteria and cyanobacteria are well known to set atmospheric nitrogen and are termed as bio fertilizers. Nitrogen fixing bacteria such as Bacillus, Azotobacter, and Rhizobium increased the crop yield to 20per cent. Pseudomonas striata are employed as seed inoculants like bio fertilizer coats for cereals.
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