Question

what is the role of bacteria in increasing the soil fertility

Answer 1

Bacteria enrich the soil with various nutrients such as Nitrogen, Phosphorous and improve the quality and texture of the soil. ... Azotobacter and Azospirillum are free-livingbacteria which absorb free nitrogen present in soil, air and convert them into amino acids and enrich the soil.

Answer 2

ANSWER :-

Following are few of the many roles that bacteria play in the field of agriculture and increasing soil fertility-

• Some free living nitrogen fixing aerobic bacteria like Azotobacter and Clostridium have the capacity of fixing atmospheric nitrogen into nitrogenous substances (substances that are rich in nitrogen), hence resulting in an increase of the fertility of the soil that they are present in.
• Symbiotic bacteria such as a bactreia named Rhizobium also help in the process of fixation of atmospheric nitrogen into nitrogenous substances.
• A bacteria named Nitrosomonas has the capabitlity to convert ammonia into nitrites. The nitrites that are formed by the help of this bacteria, are then further converted into nitrates by another bacteria named Nitrobacter and this whole process is referred to as the process of "nitrification".

Extra Information-

• All nitrogen fixing bacteria have "nif" genes.
• The abbreviation "nif"  staands for "nitrogenase inducing factor".