Farmers have reported over $50\%$ higher yields of rice by using which of the following biofertilizer
Mycorrhiza
Azolla pinnata
Cyanobacteria
Legume-Rhizobium symbiosis
How do microbes reduce the environmental degradation caused by chemicals ?
Which of the following can use molecular nitrogen as nutrient
Biofertilisers
How are microbes useful in biofertilisers ?
Azotobacter and Bacillus polymyxa are