Abstract: Most of the soils fix phosphorus (P) and make it unavailable for plant growth. Tropical soils, specifically salt affected, are deficient in P. It is estimated that major portion (~75%) of super phosphate applied is fixed and only 25% is available for plants. India has a large area of alkaline soils and to reclaim these soils heavy doses of chemical fertilizers are applied. The use of chemicals is neither economical nor ecofriendly. Biofertilizer like mycorrhizal fungi could play a very important role in this regard. They have been recognized as potential biotechnology tool for enhancing plant growth as well as for reclamation of wastelands. Arbuscular Mycorrhizal Fungi (AMF) are well known for phosphorus solubilization, increased plant nutrient uptake and in control of root diseases. Mulberry (Morus alba), an important cash crop for sericulture, does not grow well in alkaline soils due to their high pH and deficiency of nutrients and requires heavy doses of NPK for its proper growth. To propagate sericulture in salt affected area, it is important to meet the nutrient requirement of mulberry. Exploitation of AMF can meet great demand of phosphorus besides other nutrients in alkaline soils. A study was conducted to evaluate potential of AMF in reducing the amount of P required for proper growth of M. alba var. Sujan Puri in alkaline soils. Four concentrations i.e., 0, 25, 50, 75 and 100% of recommended dose of P were applied with AMF. The results suggested a net saving of 25% of the recommended dose of inorganic P i.e., triple super phosphate, with AMF in alkaline soils for the proper growth of mulberry.