It has been shown that {HEAD ~ this additional forward movement} influences very favorably {TAIL ~ the quality} of the loosening layer 
influences favorably
It has been shown that { HEAD ~ this additional forward movement } influences very favorably { TAIL ~ the quality } of the loosening layer
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH