NOVELTY - Producing plant nutritional supplement, comprises (a) screening by removing impurities of illite, jade, biotite, zeolite, serpentine, germanium and/or pegmatite and crushing into coarse particles, (b) washing the screened minerals and drying, (c) calcining the dried minerals by heat treating, (d) filtering the heat-treated minerals and pulverizing to obtain fine powder, (e) mixing rice bran, sawdust, charcoal, mineral powder and microbial fermentation broth fermented with organic acids of medicinal plants and (f) fermenting the obtained mixture by placing the mixture in a fermentation chamber.    USE - The method is useful for producing plant nutritional supplement (claimed).    ADVANTAGE - The nutritional supplement: activates growth of crops by supplying sufficient potassium, minerals, calcium and phosphate, and various beneficial soil microorganisms; neutralizes acidified soil; improves permeability and water retention properties of soil; increases yield; prevents various pests; improves soil by maintaining appropriate level of microorganism inhabits; and maintains appropriate level of corrosive substance content of the soil by oxidation and decomposition of organic matter.    DETAILED DESCRIPTION - Producing plant nutritional supplement, comprises (a) screening by removing impurities of illite, jade, biotite, zeolite, serpentine, germanium and/or pegmatite and crushing into coarse particles, (b) washing the screened minerals and drying, (c) calcining the dried minerals by heat treating at 1200-1300 degrees C for 8-11 hours, (d) filtering the heat-treated minerals using a sieve having particle size of 250-300 mesh and pulverizing to obtain fine powder, (e) mixing 58-62 wt.% rice bran, 12-16 wt.% sawdust, 8-12 wt.% charcoal, 10-12 wt.% mineral powder, and 4-6 wt.% microbial fermentation broth fermented with organic acids of medicinal plants, and (f) fermenting the obtained mixture at 25-36 degrees C for 24-72 hours by placing the mixture in a fermentation chamber.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic process flow for producing plant nutritional supplement (Drawing includes non-English language text).