irrigation system the dispersions in which the compounds are applied are most often aqueous suspensions or emulsions prepared from concentrated formulations of the compounds such water soluble water suspendable or emulsifiable formulations are either solids usually known as wettable powders or liquids usually known as emulsifiable concentrates or aqueous suspensions wettable powders which may be compacted to form water dispersible granules comprise an intimate mixture of the active compound an inert carrier and surfactants the concentration of the active compound is usually from about 10 to about 90 by weight the inert carrier is usually chosen from among the attapulgite clays the montmorillonite clays the diatomaceous earths or the purified silicates effective surfactants comprising from about 0 5 to about 10 of the wettable powder are found among the sulfonated lignins the condensed naphthalenesulfonates the naphthalenesulfonates the alkylbenzenesulfonates the alkyl sulfates and non ionic surfactants such as ethylene oxide adducts of alkyl phenols emulsifiable concentrates of the compounds comprise a convenient concentration of a compound such as from about 50 to about 500 grams per liter of liquid equivalent to about 5 to about 50 dissolved in an inert carrier which is either a water miscible solvent or a mixture of water immiscible organic solvent and emulsifiers useful organic solvents include aromatics especially the xylenes and the petroleum fractions especially the high boiling naphthalenic and olefinic portions of petroleum such as heavy aromatic naphtha other organic solvents may also be used such as the terpenic solvents including rosin derivatives aliphatic ketones such as cyclohexanone and complex alcohols such as 2 ethoxyethanol suitable emulsifiers for emulsifiable concentrates are chosen from conventional nonionic surfactants such as those discussed above aqueous suspensions comprise suspensions of water insoluble compounds of this.