Di-ammonium phosphate, murate of potash and gypsum are the conventional phosphorous, potassium and sulfur fertilizers respectively. Application of gypsum to soil can cause an increase calcium load on soil and polluted surface and underground water. The most successful technique is application of phosphorous-potassium-sulfur glass which can be added directly to the soil. Main feature of the present invention is formulation and making of a composition of high phosphorous, potassium and sulfur containing glass free from alkali like Na.sub.2O, Li.sub.2O and ZnO, which are toxic to the plants. Such glasses are capable of slow release of phosphorous, potassium and sulfur required in the area of agriculture, fungicide, pesticide and weedicides etc. The present invention also emphasize optimization of nutrient content, reduction of calcium load on the soil, minimization of surface and under-ground water pollution and maintenance of acidic environment near the plant roots in the soil.