NOVELTY - Fertilizer comprises 30-40 pts. wt. of ammonium sulfate, 18-20 pts. wt. of potassium sulfate, 3-4 pts. wt. of borax, 2-3 pts. wt. of zinc sulfate, 2-3 pts. wt. of ferrous sulfate, 1-2 pt(s). wt. of root stimulating agent, 10-12 pts. wt. of radix stemonae powder, 4-5 pts. wt. of brown sugar, 30-34 pts. wt. of oyster shell powder, 1-2 pt(s). wt. of thiourea, 2-3 pts. wt. of lignin, 1-2 pt(s). wt. of polyacrylamide, 30-34 pts. wt. of carbon black, 10-12 pts. wt. of wood vinegar, 100-120 pts. wt. of chicken manure, 3-4 pts. wt. of effective microorganism and 4-6 pts. wt. of coating agent.    USE - The fertilizer is useful for watermelon (claimed).    ADVANTAGE - The fertilizer: has balanced nutrition value; increase the yield and sweetness of watermelon; reduces the fermentation time; and does not damage the soil damage.    DETAILED DESCRIPTION - Fertilizer comprises 30-40 pts. wt. of ammonium sulfate, 18-20 pts. wt. of potassium sulfate, 3-4 pts. wt. of borax, 2-3 pts. wt. of zinc sulfate, 2-3 pts. wt. of ferrous sulfate, 1-2 pt(s). wt. of root stimulating agent, 10-12 pts. wt. of radix stemonae powder, 4-5 pts. wt. of brown sugar, 30-34 pts. wt. of oyster shell powder, 1-2 pt(s). wt. of thiourea, 2-3 pts. wt. of lignin, 1-2 pt(s). wt. of polyacrylamide, 30-34 pts. wt. of biological carbon black, 10-12 pts. wt. of wood vinegar, 100-120 pts. wt. of chicken manure, 3-4 pts. wt. of effective microorganism and 4-6 pts. wt. of coating agent. The coating agent comprises 20-22 pts. wt. of chlorinated paraffins, 2-3 pts. wt. of gamma -methacryloxypropytrimethoxysilane, 0.1-0.2 pt. wt. of nanocarbon, 2-3 pts. wt. of jade powder and 2-3 pts. wt. of polyoxyethylene sorbitan monooleate, where the coating agent is prepared by mixing, grinding and uniformly dispersing the above mixture. An INDEPENDENT CLAIM is included for the preparation of fertilizer comprising: mixing chicken manure, carbon black, radix stemonae powder, brown sugar, oyster shell powder and wood vinegar, adding effective microorganism and water, uniformly stirring and fermenting the mixture for 5-7 days, where the fermenting step takes place by stirring the mixture once in 2-3 days until the mixture is completely decomposed; further adding the other raw materials of powder coating agent and uniformly mixing; and heating the obtained mixture at 80-90 degrees C, stirring and granulating.