Question

Write short notes on , (a) Mycorrhiza, (b) Role of VAM in crop improvement, (c) Rhizobium-legume symbiosis , (d) Green manure

Answer 1

(a) A mycorrhiza is a symbiotic association between the fungus and the roots of the vascular host plant.

(b) VAM is a fungus that penetrates the roots of a vascular plant in order to help them to capture nutrients from the soil.

(c) It is a group of soil bacteria that infects the roots of legumes to form root nodules.

(d) Green manuring is plowing under the soil incorporation of any green manure crops while they are green or soon after they flower. Green manures are forage or leguminous crops that grow for their leafy materials needed for soil conservation.