NOVELTY - Corn fertilizer comprises (pts.wt.) organic matter (100-200), composite fertilizer (200-330), active sealing agent (0.2-3), acrylamide (150-200), starch (50-100), attapulgite (20-50), porous inorganic matter (20-40), clay (30-60), acidic liquid (100-150), initiator (2-4), crosslinking agent (0.5-1), and compost fermenting agent (0.03-0.1). The composite fertilizer comprises nitrogen, phosphorus, potassium, and zinc at weight ratio of 1:0.45-0.6:0.4-0.55:0.1-0.25; and further comprises hydroquinone and dicyandiamide having usage amount of 2-3% of nitrogen fertilizer in the composite fertilizer.    USE - Corn fertilizer.    ADVANTAGE - The fertilizer can conserve water by utilizing water-retaining agent, and modify soil by adding organic matter, porous inorganic matter and the clay. It improves the soil structure and adjusts soil alkalinity or acidity.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the fertilizer, comprising:    (A) crushing humic acid and organic material, screening through 100 mesh sieve; adding compost fermenting agent and mixing; piling at normal temperature and fermenting for two weeks or fermenting at 45-60 degrees C and 60-70% humidity for 24-72 hours; airing for three days to dry or drying using a drier to obtain matured organic fertilizer; and secondarily crushing as compost product, where the humic acid comprises turf and/or brown coal and the organic material comprises sawdust, peanut cake and bean cake;    (B) adding water to starch at 50-100 degrees C and gelatinizing for 20 minutes to 1 hour, then adding acidified and crushed attapulgite, acrylamide, compost, crosslinking agent and initiator, heating to 40-90 degrees C and reacting for 4-5 hours;    (C) adding alkali liquor to the obtained starchy material and adjusting pH to 7.5-9.5, heating to 90-100 degrees C, hydrolyzing for 1-3 hours, and crushing reacted product after washing and drying;    (D) adding porous inorganic matter and clay to acidic liquid, mixing for 10-50 minutes and dipping for 3-40 hours, filtering, adding alkali liquor and adjusting pH to 3-6.5; and    (E) uniformly mixing the obtained materials from the third and fourth steps and the composite fertilizer, piling and etching at normal temperature for 3-5 days; after airing or drying and crushing, spraying 0.8-1.5 mol/L of dilute sulfuric acid (0.9-1.1 wt.%) as binder; granulating in disc granulating machine; conveying the obtained granule in double cantilever mixer after granulating; opening the machine to revolve and spraying emulsifier; and mixing uniformly, airing and bagging.