NOVELTY - Fertilizer comprises spinach residue, celery, dried natural sheep manure, dead leaves, corn straw, essential microorganism, boric acid, stannous chloride, sodium bisulfite, oxalic acid, fused calcium magnesium phosphate fertilizer, phosphogypsum, iron-containing residue, EDTA chelated boron, magnesium sulfate, ammonium citrate, auxiliary agent, and water.    USE - The fertilizer is useful for growing tomato (claimed) rich in iodine content which is useful for preventing thyroid disease.    ADVANTAGE - The fertilizer is rich in iodine content.    DETAILED DESCRIPTION - Fertilizer comprises 10-14 pts. wt. spinach residue, 16-20 pts. wt. celery, 8-10 pts. wt. dried natural sheep manure, 5-7 pts. wt. dead leaves, 6-8 pts. wt. corn straw, 0.05-0.1 pt. wt. essential microorganism, 0.4-0.6 pt. wt. boric acid, 0.01-0.03 pt. wt. stannous chloride, 0.03-0.05 pt. wt. sodium bisulfite, 0.06-0.1 pt. wt. oxalic acid, 4-6 pts. wt. fused calcium magnesium phosphate fertilizer, 0.5-0.8 pt. wt. phosphogypsum, 3-5 pts. wt. iron-containing residue, 0.02-0.05 pt. wt. EDTA chelated boron, 1.5-3 pts. wt. magnesium sulfate, 0.03-0.06 pt. wt. ammonium citrate, 0.4-0.6 pt. wt. auxiliary agent, and water (suitable quantity). The auxiliary agent comprises 1-2 pts. wt. dimethylpropane, 0.2-0.5 pt. wt. sodium carboxymethyl cellulose, 0.3-0.8 pt. wt. epichlorohydrin, 2-3 pt. wt. dimethicone, 10-12 pts. wt. nanocarbon powder, 0.8-1.2 pt. wt. diethylaminoethanol, 13-16 pts. wt. ash, 1.5-2 pts. wt. ammonium chloride, and water (remainder). The auxiliary agent is prepared by dissolving the diethylaminoethanol in 10-12 times water, adding dimethylpropane, sodium carboxymethyl cellulose, epichlorohydrin, dimethicone and ammonium chloride to the mixture, heating the mixture at 60-80 degrees C for 10-15 minutes, adding the nanocarbon powder and ash to the mixture, stirring the mixture to obtain paste, and drying and crushing the stirred mixture. An INDEPENDENT CLAIM is included for method for preparing the above-mentioned fertilizer, which involves (a) mixing the spinach residue, celery, dried natural sheep manure, dead leaves and corn straw, stirring the mixture and sterilizing the mixture at 150-200 degrees C for 30-40 minutes, (b) diluting the essential microorganism in water in a mass ratio of 1:10, mixing the product obtained in step (a) with the diluted essential microorganism mixture and fermenting the mixture at 38-45 degrees C for 6-8 days, (c) mixing the remaining materials, adding 1-15 times water to the mixture and ultrasonically stirring the mixture at 0.4-0.8 w/cm2 for 30-40 minutes, and (d) mixing the products obtained in the steps (b) and (c), stirring and agitating the mixture, adjusting water content of the mixture to less than 20%, sieving the mixture to mesh size of 200, and grinding and granulating the mixture.