NOVELTY - Synergistic fertilizer comprises modified phosphate powder (60-80 pts. wt.), soybean (14-16 pts. wt.), weathered coal (7-9 pts. wt.), bentonite (36-40 pts. wt.), castor cake (8-10 pts. wt.), talc (6-7 pts. wt.), potassium chloride (5-8 pts. wt.), attapulgite (3-4 pts. wt.) and water. Modified phosphate powder comprises phosphate powder (90-110 pts. wt.), gamma polyglutamate powder (1-2 pts. wt.), ferrous sulfate (4-8 pts. wt.), calcium bicarbonate (6-9 pts. wt.), Bacillus subtilis (2-3 pts. wt.), silicate inoculant (3-4 pts. wt.) and EDTA chelated copper (18-22 pts. wt.).    USE - Synergistic fertilizer used for improving peanut yield (claimed).    ADVANTAGE - The synergistic fertilizer is obtained by a cost-effective method, and requires raw material that are economic, and prevents degradation of soil.    DETAILED DESCRIPTION - Synergistic fertilizer comprises modified phosphate powder (60-80 pts. wt.), soybean (14-16 pts. wt.), weathered coal (7-9 pts. wt.), bentonite (36-40 pts. wt.), castor cake (8-10 pts. wt.), talc (6-7 pts. wt.), potassium chloride (5-8 pts. wt.), attapulgite (3-4 pts. wt.) and water. Modified phosphate powder comprises phosphate powder (90-110 pts. wt.), gamma polyglutamate powder (1-2 pts. wt.), ferrous sulfate (4-8 pts. wt.), calcium bicarbonate (6-9 pts. wt.), Bacillus subtilis (2-3 pts. wt.), silicate inoculant (3-4 pts. wt.), EDTA ch-elated copper (18-22 pts. wt.), manganese humate (24-26 pts. wt.), black liquor (13-17 pts. wt.) and corn starch (35-45 pts. wt.). Modified phosphate powder is prepared by heating black liquor and adding phosphate powder to it to obtain a mixture. Obtained mixture is calcined at 400-500 degrees C. Calcined product is mixed with gamma polyglutamate powder, manganese humate, EDTA chelated copper and corn starch to obtain another mixture. Obtained product is ground to obtain a powder of particle size 150 mesh. Obtained powder is mixed with ferrous sulfate at 40-60 degrees C to carry out chelation. Chelated product is mixed with calcium bicarbonate at 20-30 degrees C to obtain third mixture. Obtained product is mixed with Bacillus subtilis and silicate inoculant at 60-70 degrees C to obtain fourth mixture. Obtained product is cooled at room temperature for 7-8 days. Obtained product is mixed with immobilized microbial agents and ground to obtain final product of particle size 100-120 mesh. An INDEPENDENT CLAIM is included for a method for preparing synergistic fertilizer, which involves:    (A) heating bentonite at 700-800 degrees C for 2-3 hours, and grinding it to obtain particle size of 100 mesh;    (B) fermenting soybean, weathered coal and castor cake at 50-55 degrees C for 3-4 weeks;    (C) mixinmg obtained products with attapulgite to obtain a mixture;    (D) adding remaining raw material to obtained mixture to obtain another mixture; and    (E) grinding obtained product to obtain final product of particle size 80-100 mesh.