The availability of the waste dust contents for {HEAD ~ soil fertilization} was demonstrated by subjecting the material to {TAIL ~ multiple digestions} with boiling distilled water 
The availability of the waste dust contents for { HEAD ~ soil fertilization } was demonstrated by subjecting the material to { TAIL ~ multiple digestions } with boiling distilled water
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH