Which of the following is non-symbiotic biofertilizer

Aquatic fern which is an excellent biofertilizer

$VAM $ is important for

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?

Which of the following are the part or example of symbiotic mutualistic association?

$I.$ Yeast

$II.$ Rhizobium

$III.$ Mycorrhiza

$IV.$ Oscillatoria