NOVELTY - Special fertilizer comprises 45-45.8 pts. wt. potassium sulfate, 17.3-18 pts. wt. urea, 13.6-14.4 pts. wt. monoammonium phosphate, 8-8.8 pts. wt. wine residue, 5-5.9 pts. wt. rapeseed cake, 2.8-3.5 pts. wt. sodium polyacrylate, 1.8-2.5 pts. wt. zinc sulfate, 0.9-1 pt. wt. EDTA, and 0.05-0.1 pt. wt. diethyl aminoethyl hexanoate.    USE - The special fertilizer is useful for improving drought resistance of potato crops (claimed).    ADVANTAGE - The fertilizer provides nitrogen, phosphorus, potassium and zinc required for growth of potato crops, balances soil nutrients, and improves quality and yield of potato crops, and absorption rate of nutrients chosen from nitrogen, phosphorus and potassium by the potato crop.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for preparing the special fertilizer, which involves (a) adding 1000 kg wine to 3.47 kg urea, adjusting carbon-to-nitrogen (C/N) ratio of obtained mixture to 25:1, adding water to the mixture until water content of the mixture reaches 55-60%, uniformly mixing obtained mixture, digging soil to provide pit having depth of 2-3 m, width of 2-3 m and length of 8-10 m, and filling the mixture in the pit, sealing the pit, fermenting the mixture in the pit for 130-133 days, storing fermented product in a cool-dry place for 30-45 days until the water content of the fermented product is less than 5%, and filtering the fermented product using 5 mm sieve to obtain wine residues, (b) adding 1000 kg rapeseed cake to 6.34 kg urea, adjusting C/N ratio of obtained mixture to 25:1, adding water to the mixture until water content of the mixture reaches 55-60%, uniformly mixing obtained mixture, digging soil to provide pit having depth of 2-3 m, width of 2-3 m and length of 8-10 m, and filling the mixture in the pit, sealing the pit, fermenting the mixture in the pit for 145-150 days, storing fermented product in a cool-dry place for 30-45 days until the water content of the fermented product is less than 5%, and filtering the fermented product using 5 mm sieve residue, (c) crushing the potassium sulfate, urea, monoammonium phosphate, sodium polyacrylate, zinc sulfate, EDTA, diethyl aminoethyl hexanoate, wine residue obtained in step (a) and residue of rapeseed cake obtained in step (b), respectively, to obtain respective powders having particle diameter of 0.05-0.1 mm, and (d) adding respective powders obtained in step (c) to mixer, stirring the mixture for 25-30 minutes, uniformly mixing and granulating mixture using granulator, drying granules, cooling the granules, grading the granules, and sieving and packaging obtained product.