Question

A smart farmer used rhizobium and azolla for sustainable agriculture. what is the collective term for such nitrogen fixers, mycorrihizal fungi, etc which adds nutrients to soil ​

Answer 1

Answer:

Biofertilizers are the organism that enriches the nutrient quality of the soil. The main sources of biofertilizers are bacteria, fungi and cyanobacteria. Azolla is water fern which is also used as a biofertilizer. There are around 80,000 symbiotic cyanobacteria present on its leaves. Symbiotic cyanobacteria Anabaena Azollae is responsible for nitrogen-fixation which increases the fertility of the soil and in turn enhances the yield. Azolla pinnata, a pteridophyte, is used as an excellent fertilizer in rice field.