Basic nitrogen contents reach {TAIL ~ up to 2,000 ppm} while {HEAD ~ the total nitrogen contents} reach 3,000 ppm or more 
Basic nitrogen contents reach { TAIL ~ up to 2,000 ppm } while { HEAD ~ the total nitrogen contents } reach 3,000 ppm or more
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH