Question

How do biofertilizers enrich the fertility of the soil?

Answer 1

Hint: A biofertilizer is made up of living microorganisms. When rip –off to field it promotes the plant growth it is a primary nutrient to the host plant and enriches the fertility of the soil. They are eco-friendly and cost effective.

Complete answer:
The term biofertilizer is used for microorganisms because in the term biofertilizer Bio means life that brings microorganism and nutrient enrichment and the environmental hazards of chemical fertilizers. They are living organisms which help in increasing the fertility of soil.
There are three types of ways to obtain biofertilizers: Bacteria, fungi and cyanobacteria. In bacteria Example-Rhizobium is a symbiotic bacteria found in the root nodules of leguminous plants. Other examples of bacteria that act as biofertilizer are Azospirillum and Azotobacter are free living nitrogen-fixing bacteria. Symbiotic association between plants and fungi is called Mycorrhizae. In cyanobacteria these are blue green bacteria whereas Anabaena, Nostoc, and Oscillitoria are examples of nitrogen-fixing cyanobacteria. Function of biofertilizers increases the physical and chemical structure of soil like buffer capacity and water holding capacity of the soil. Rhizobium is an example biofertilizer that is introduced in roots and it fixes nitrogen for the plants. And are also used for nitrogen fixation.

Additional information: Biofertilizers are so important in organic farming because they are completely environment-friendly. They form a symbiotic relationship with plants, in which the partners derive benefits from each other.

Note: Biofertilizer is a substance that contains living organisms which is used to increase the fertility of the soil. It is used for chemical fertilizers because it causes very less pollution.