Known by its chemical name of N-(phosphonomethyl)glycine and chemical formula of C3H11N2O3P, ammonium salt of glyphosate 71% SG herbicide controls weeds of all kinds, including perennial and annual. It destroys weed by reaching to the crops roots and rhizomes. It must be applied to control weeds that are difficult to control. Farmers can apply ammonium salt of glyphosate 71% SG herbicide before as well as after emergence of weeds, including annual grass and broad leave. The herbicide is absorbed through foliage and roots. It controls weeds by interfering with their enzymatic activities.