Application of {HEAD ~ outside forces}, such as caused by {TAIL ~ tilling}, rainstorms, irrigation, etc., insures complete breakdown of these granules 
Application of { HEAD ~ outside forces } , such as caused by { TAIL ~ tilling } , rainstorms , irrigation , etc . , insures complete breakdown of these granules
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH