Fecha de publicación: -- Fuente: WIPO "tomato" The present invention aims at providing a method of utilizing poorly-soluble phosphoric acid, the method being capable of easily recycling poorly-soluble phosphoric acid in soil. The present invention is a method of utilizing poorly-soluble phosphoric acid, the method effectively utilizing poorly-soluble phosphoric acid in soil, characterized in that nanobubble water is sprayed over soil containing poorly-soluble phosphoric acid to generate phosphate ions from the poorly-soluble phosphoric acid by means of the nanobubble water.