The chemical fertilizer required for better rhizobial nitrogen fixation is
Phosphorus
Potassium
Calcium
Sodium
Which of the following is free living aerobic and nonphotosynthetic nitrogen fixing bacterium
Farmers have reported over $50\%$ higher yields of rice by using which of the following biofertilizer
Which one of the following is not a biofertiliser?
Which one of the following is not a biofertilizer?