NOVELTY - A controlled fertilizer comprises red sugar slag, switch grass, sea globosa, waste wood, lime, tea leaves, castor cake, biological microbial inoculum, limestone powder, copper sulfate pentahydrate, ammonium chloride, potassium nitrate, urea, EDTA chelated zinc, phosphate fertilizer, alkyd resin, isopropyl alcohol, sodium dodecyl benzene sulfonate, crosslinking agent, and water.    USE - Controlled fertilizer used for jujube tree plantation.    ADVANTAGE - The fertilizer can provide basic soil suitable for growing jujube.    DETAILED DESCRIPTION - A controlled fertilizer comprises 20-28 pts. wt. red sugar slag, 40-50 pts. wt. switch grass, 26-30 pts. wt. sea globosa, 50-60 pts. wt. waste wood, 18-25 pts. wt. lime, 20-24 pts. wt. tea leaves, 60-70 pts. wt. castor cake, 2-3 pts. wt. biological microbial inoculum, 12-15 pts. wt. limestone powder, 4-5 pts. wt. copper sulfate pentahydrate, 8-12 pts. wt. ammonium chloride, 10-12 pts. wt. potassium nitrate, 7-9 pts. wt. urea, 2-3 pts. wt. EDTA chelated zinc, 6-8 pts. wt. phosphate fertilizer, 8-12 pts. wt. alkyd resin, 2-3 pts. wt. isopropyl alcohol, 3-4 pts. wt. sodium dodecyl benzene sulfonate, 4-5 pts. wt. crosslinking agent, and balance water. The crosslinking agent comprises 2-3 pts. wt. butyl acrylate, 3-5 pts. wt. tributyl citrate, 2-3 pts. wt. rosin powder, 5-7 pts. wt. green cucumber wood powder, 1-2 pts. wt. N,N-methylene-bisacrylamide, 4-5 pts. wt. ethanol, 1-2 pts. wt. shellac powder and balance water. The crosslinking agent is prepared by (a) dissolving ethanol and water in a ratio of 1:2, then adding rosin powder, butyl acrylate, N,N-methylene-bisacrylamide and tributyl citrate, heating at 70-90 degrees C with stirring dissolve; (b) mixing the green papaya powder and shellac powder, adding 10 times water, and stirring to mix uniformly; and (c) mixing two solvents obtained from steps (a) and (b), and heating for 20-30 minutes. An INDEPENDENT CLAIM is included for the preparation of controlled fertilizer comprising:    (A) dry mixing the red sugar slag, switchgrass, waste wood, slaked lime, tea dregs and castor, crushing into powder of 160 meshes, then adding biological microbial inoculum with 10 times water dilution, mixing after adjusting water content to 40% at 40-46 degrees C, fermenting for 22-25 days, every 2 days stirring;    (B) mixing copper sulfate pentahydrate, ammonium chloride, potassium nitrate, urea, EDTA chelated zinc and phosphate fertilizer, adding 5-6 times water after heating and stirring to dissolve, adding alkyd resin, sodium dodecyl benzene sulfonic acid sodium salt, isopropyl alcohol, crosslinking agent and other following not a residual component, and continue heating and stirring for 10-15 minutes;    (C) adding a limestone powder to the mixed solution, heating with stirring for 30-40 minutes, naturally cooling after solidification, then crushing into 2-20 meshes resin granule; and    (D) mixing the fermentation material and resin granule, and adjusting water content to 20% and obtaining the product.