Farmers have reported over $50\%$ higher yields of rice by using which of the following biofertilizer

Most famous nitrogen fixing bacterium/biofertilizer is

Leghaemoglobin occurs in

Azolla enriches rice fields with nitrogen due to its association with

Consider the following statements about organic farming

$I.$ Organic farming promotes the use of crop rotations and cover crops and encourages balanced host/predator relationships

$II.$ Integrated pest and weed management and soil conservation systems are valuable tools on an organic farm

$III.$ Organic farming protects the environment, minimize soil degradation and erosion and decrease pollution

Which of the statements given above are correct?