NOVELTY - Fertilizer comprises molasses, yeast powder, borax, cottonseed, vermiculite, Corydalis bungeana, calcium-magnesium phosphate, rice bran, peat, ammonium sulfate, plant ash, potassium dihydrogen phosphate, silicate bacteria, silicon-substituted hydroxyapatite, and auxiliary agent. The auxiliary agent contains iron ore powder, fresh konjac, amino acid chelated magnesium, amino acid chelated copper, amino acid chelated boron, amino acid chelated manganese, methyl methacrylate, N-butylthio triamide, fresh grass, and coral limestone.    USE - The fertilizer is useful for improving uptake of potassium ions by crops (claimed).    ADVANTAGE - The fertilizer improves yield and quality of crops. The method is simple and cost-effective to perform, and reduces usage amount of fertilizer.    DETAILED DESCRIPTION - Fertilizer comprises 4-5 pts. wt. molasses, 3-4 pts. wt. yeast powder, 4-6 pts. wt. borax, 40-60 pts. wt. cottonseed, 8-10 pts. wt. vermiculite, 3-5 pts. wt. Corydalis bungeana, 20-26 pts. wt. calcium-magnesium phosphate, 60-70 pts. wt. rice bran, 15-25 pts. wt. peat, 4-6 pts. wt. ammonium sulfate, 27-33 pts. wt. plant ash, 6-8 pts. wt. potassium dihydrogen phosphate, 2-4 pts. wt. silicate bacteria, 4-7 pts. wt. silicon-substituted hydroxyapatite, and 5-7 pts. wt. auxiliary agent. The auxiliary agent comprises 4-6 pts. wt. iron ore powder, 3-6 pts. wt. ethylenediamine-N,N'-bis(2-hydroxyphenylacetic acid) (EDDHA) chelated iron, 8-10 pts. wt. fresh konjac, 3-4 pts. wt. amino acid chelated magnesium, 3-4 pts. wt. amino acid chelated copper, 3-4 pts. wt. amino acid chelated boron, 3-4 pts. wt. amino acid chelated manganese, 1-3 pts. wt. methyl methacrylate, 0.1-0.2 pt. wt. N-butylthio triamide, 12-16 pts. wt. fresh grass, and 8-12 pts. wt. coral limestone. The auxiliary agent is prepared by (i) rinsing the fresh konjac and fresh grass using purified water, adding the fresh konjac and fresh grass to mortar, crushing obtained mixture for 20-40 minutes, filtering the mixture, and collecting filtrate, (ii) crushing the coral limestone and iron ore to obtain powder, mixing the powder with EDDHA chelated iron, amino acid chelated magnesium, amino acid chelated copper, amino acid chelated boron, amino acid chelated manganese and filtrate obtained in step (i), uniformly stirring obtained mixture, subjecting the mixture to wet granulation to obtain granules having particle diameter of 2-4 mm, and (iii) mixing the granules with methyl methacrylate and N-butylthio triamide, and drying and cooling obtained product. An INDEPENDENT CLAIM is included for method for preparing the fertilizer, which involves (a) adding the molasses, yeast powder, rice bran and cottonseed to fermentation tank, then adding suitable amount of water and 0.5 wt.% effective microbial (EM) agent to obtained mixture, performing anaerobic fermentation for 7-12 days, and controlling water content of mixture at 40% during fermentation, (b) adding the peat, plant ash, C.bungeana, calcium-magnesium phosphate and fermented product obtained in step (a) to fermentation tank, then adding 0.3 wt.% Bacillus subtilis agent, controlling water content of mixture at 50%, performing aerobic fermentation at 40-70 degrees C for 60-72 hours, adding 0.2 wt.% Aspergillus niger agent to mixture, fermenting the mixture for 18-20 days, and drying fermented product, (c) subjecting vermiculite and silicon-substituted hydroxyapatite to steam sterilization at 1.05 kg/cm2 for 40-60 minutes, and crushing sterilized components to obtain powder, and (d) mixing products obtained in steps (b) and (c), adding the silicate bacteria, borax, ammonium sulfate, potassium dihydrogen phosphate and auxiliary agent to obtained mixture, uniformly mixing and adding 0.8 wt.% rare earth element as binder, uniformly stirring obtained mixture to obtain product having particle diameter of 8-12 mm, and drying the product at low temperature.