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