<；P>；PROBLEM TO BE SOLVED: To provide a method of producing a slow release fertilizer which uses no organic polymer material having trouble on a conventional slow release fertilizer, with a simple production process and reduced production cost, and a cultivation method of plant using the slow release fertilizer which is obtained by the producing method, supplying fertilizer components necessary for the growth and free from the occurrence of barrier to growth and the run-off of the fertilizer components to the environment. <；P>；SOLUTION: In the method for producing the slow release fertilizer, chemical fertilizer powder and oxide powder are mixed and pulverized to produce a hardly water-soluble reaction product by the mechanochemical reaction of the chemical fertilizer with the oxide. As the oxide, at least one or more kinds of oxides among alumina, silica, kaolin or the oxides contained in or constituting the soil are preferable. The cultivation method of the plant uses the hardly-water soluble and citric acid-soluble slow release fertilizer produced by the mechanochemical reaction. <；P>；COPYRIGHT: (C)2010,JPO&INPIT
