BOTANY

Detailed explanation-1: -A few examples of bacterial biofertilisers are Rhizobium, Azotobacter and Azospirillum. Azolla is an aquatic plant that has a symbiotic relationship with a bacteria called Anabaena.

Detailed explanation-2: -Yes, Rhizobium is a biofertilizer. Biofertilizers are substances that contain microorganisms which when applied to the soil increase the nutrient content and enhance the plant growth.

Detailed explanation-3: -Owing to its ability to improve plant health through nitrogen fixation, growth hormone production, phosphate solubilization, plant disease management and reclamation of better soil health, Azotobacter is one of the best options to be used as biofertilizer for eco-friendly and sustainable crop production.

Detailed explanation-4: -Biofertilizers are three types, nitrogen fixing bacteria, nitrogen-fixing cyanobacteria and mycorrhiza e.g., Rhizobium, Azotobacter, Azolla, Nostoc, Azospirilium and blue-green algae have been in use a long time.

Detailed explanation-5: -Biofertilizers such as Rhizobium, Azotobacter, Azospirilium and blue green algae(BGA) have been in use a long time. Rhizobium inoculant is used for leguminous crops. Azotobacter can be used with crops like wheat, maize, mustard, cotton, potato and other vegetable crops.