NOVELTY - Biological fertilizer comprises 300-350 pts. wt. mountain soil, 200-300 pts. wt. rice bran, 150-200 pts. wt. starch, 2-3 pts. wt. effective microorganism, 5-10 pts. wt. humic acid, 75-85 pts. wt. urea, 40-50 pts. wt. nanocarbon, 20-35 pts. wt. ferric sulfate, 5-10 pts. wt. cyclohexanediamine tetraacetic acid disodium, 20-25 pts. wt. borax, 15-20 pts. wt. zinc sulfate, 10-15 pts. wt. manganese sulfate and 10-13 pts. wt. soil improvers.    USE - Biological fertilizer.    ADVANTAGE - The biological fertilizer is free of toxic heavy metal elements, increases the yield and growth of the crop, improves the physical and chemical properties of the soil and provides nutritional element to activate the soil.    DETAILED DESCRIPTION - Biological fertilizer comprises 300-350 pts. wt. mountain soil, 200-300 pts. wt. rice bran, 150-200 pts. wt. starch, 2-3 pts. wt. effective microorganism, 5-10 pts. wt. humic acid, 75-85 pts. wt. urea, 40-50 pts. wt. nanocarbon, 20-35 pts. wt. ferric sulfate, 5-10 pts. wt. cyclohexanediamine tetraacetic acid disodium, 20-25 pts. wt. borax, 15-20 pts. wt. zinc sulfate, 10-15 pts. wt. manganese sulfate and 10-13 pts. wt. soil improvers. The soil improver comprises 110-120 pts. wt. sepiolite powder, dodecyl ester, 4-5 pts. wt. nano jade powder, 2-3 pts. wt. ascorbic acid, 3-4 pts. wt. magnesium sulfate, 1-2 pts. wt. lentinan, 3-4 pts. wt. phenyltriethoxysilane, 3-4 pts. wt. manganese carbonate, 5-6 pts. wt. ferrous sulfate and balance of water. The soil improves is prepared by mixing sepiolite, nano jade powder and water, grinding the mixture to form a slurry, heating the slurry at 70-75 degrees C, adding ascorbic acid, magnesium sulfate, lentinan and phenyltriethoxysilane, continuously grinding the mixture for 30-45 minutes, concentrating the mixture, drying, finally adding remaining components, uniformly mixing and granulating. An INDEPENDENT CLAIM is included for the preparation of the biological fertilizer comprising: weighing mountain soil, rice bran, starch, effective microorganism and water, dissolving starch in water, evenly spreading the slurry on the rice bran and effective microorganism and stirring; adding water to the mountain soil, adjusting the moisture content to 40-50%, piling the product, turning the pile once every other day and fermenting the pile for 13-15 days; decomposing the material to dry, pulverizing, adding urea, humic acid, nanocarbon, ferric sulfate, cyclohexanediamine tetraacetic acid disodium, borax, zinc sulfate and manganese sulfate, uniformly stirring and granulating; and finally adding the soil improver and mixing.