Explanation:

Mycorrhizal fungi acts as biofertiliser and are known to occur naturally on roots of forest trees and crop plants. Mycorrhizal fungi resist disease in plants. The plants also show drought and salinity resistance. Plants  an tolerate adverse soil, pH, high temperature and heavy metal toxicity. In soils low in available nutrients there is an increased absorption of nutrients by plants infected with Mycorrhiza. The fungus has the ability to dissolve and absorb phosphorus that plant roots cannot readily absorb. A wise way will be to develop an integrated nutrient supply system involving the combination of chemical fertilizers and biofertilisers.