NOVELTY - Special fertilizer is prepared using base fertilizer and additional fertilizer. The base fertilizer comprises biogas residue, leaves, plant ash, garlic straw, traditional Chinese medicine, potassium sulfate, diammonium phosphate and urea. The additional fertilizer comprises potassium sulfate, diammonium phosphate, sulfur, 70% fosetyl aluminum-mancozeb wettable powder (WP) and chlorothalonil WP.    USE - As special fertilizer for garlic.    ADVANTAGE - The special fertilizer ensures to increase yield of garlic, improve quality of garlic and reduce occurrence of diseases during planting phase.    DETAILED DESCRIPTION - Special fertilizer is prepared using base fertilizer and additional fertilizer. The base fertilizer comprises 100 pts. wt. biogas residue, 30 pts. wt. leaves, 15 pts. wt. plant ash, 30 pts. wt. garlic straw, 5 pts. wt. traditional Chinese medicine, 15 pts. wt. potassium sulfate, 30 pts. wt. diammonium phosphate and 20 pts. wt. urea, where the traditional Chinese medicine comprises 10 pts. wt. Veratrum nigrum, 10 pts. wt. Derris, 10 pts. wt. Celastrus angulatus, 10 pts. wt. Tripterygium wilfordii, 10 pts. wt. cortex pseudolaricis, 10 pts. wt. Cercis chinensis and 1 pt. wt. pomegranate peel and the base fertilizer is a fermented product prepared by inoculating 1 wt.% effective microorganism (EM) diluted with water in mass ratio of 1:100 and has water content of 10-15 wt.%. The additional fertilizer comprises 15 pts. wt. potassium sulfate, 30 pts. wt. diammonium phosphate, 5 pts. wt. sulfur, 1 pt. wt. 70% 70% fosetyl aluminum-mancozeb wettable powder (WP) and 1 pt. wt. 75% chlorothalonil WP. An INDEPENDENT CLAIM is included for method of preparing the special fertilizer, which involves (a) weighing above-mentioned raw materials, (b) preparing bacterial inoculum, (c) weighing biogas residue, leaves, garlic straw and traditional Chinese medicine, mixing weighed raw materials, adding mixed raw materials into a fermentation tank, inoculating the bacterial inoculum obtained in the step (b) to the raw materials and fermenting the resulting materials for 7-10 days to obtained fermented material, where the material is turned once every two days, (d) weighing plant ash, potassium sulfate, diammonium phosphate, and urea, mixing the weighed raw materials with the fermented material obtained in the step (c), drying the mixed raw materials, crushing dried materials, granulating crushed materials, packaging and storing as base fertilizer, and (e) weighing and mixing potassium sulfate, diammonium phosphate, sulfur, 70% fosetyl aluminum-mancozeb WP and chlorothalonil WP to obtain mixture and granulating the resulting mixture to obtain additional fertilizer.