HUME PHOS (Humic Acid) is mainly an organic composition. It is derived from the decomposition process of dead species plants soil coal and other organic matters. It has a characteristic of forming a composition with iron and other metallic compound. Being mainly an organic compound, it has the best characteristics as a fertilizer. It stimulates the secretion of hormones, necessary for plant growth (and hence the production). It has a special power to improve trace-mineral transportation.