Farmers have reported over $50\%$ higher yields of rice by using which of the following biofertilizer
Mycorrhiza
Azolla pinnata
Cyanobacteria
Legume-Rhizobium symbiosis
Which one of the following is not a biofertiliser?
Yield of paddy field can be increased by application of
The common nitrogenfixer in paddy fields is
Which one of the following is not a biofertilizer?