General Knowledge - Biology - Discussion

Plant directly cannot absorbed nitrogen from atmosphere so during rain nitrogen come down and soil convert them in to nitrites and nitrates which is absorbed by plants with the help of rizobium animals eat the plant when they die bacteria decomposes the body of animal and nitrogen is set free in the atmosphere. And nitrogen level is maintained in atmosphere by the process called nitrification, ammonification, and de nitrificatio as mention above.

Nitrogen cycle involves nitrification denirification and ammonifixation which are carried out for proper maintenance of nitrogen content in biosphere.

Nitrogen cycle contains three processes named nitrification,denitrification,ammonification as mentioned above.
These processes together maintains the balance of N2 in the atmosphere. These processes are carried out bu aome nitrogen fixing bacterias like Rhizobium.

Due to maintain the cycle of processes such as nitrification, denitrification, ammonification etc it is very essential to remain in the biosphere.

Rhizobium plays an important role in nitrogen fixation.