One such method is commonly called tank mixing in which the two essential ingredients in {HEAD ~ their commercially available forms} are mixed together by {TAIL ~ the farmer} or entomologist in the quantity of water most useful for the direct application 
are mixed together by
One such method is commonly called tank mixing in which the two essential ingredients in { HEAD ~ their commercially available forms } are mixed together by { TAIL ~ the farmer } or entomologist in the quantity of water most useful for the direct application
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH