Cov khoom siv hluav taws kub qhov rooj yog ua los ntawm cov hluav taws-resistant ntoo raws li lub qhov rooj thav duab, lub qhov rooj nplooj ntoo thiab lub qhov rooj nplooj vaj huam sib luag. Lub qhov rooj nplooj muaj cov khoom tsis muaj tshuaj lom, tsis muaj mob, txuag hluav taws xob thiab ib puag ncig-phooj ywg hluav taws kub rwb thaiv tsev cov ntaub ntawv, thiab yog nruab nrog cov khoom siv tiv thaiv hluav taws. Lub qhov rooj hluav taws kub tsis tsuas yog txo cov nqi tsim khoom, tab sis kuj paub txog kev txuag hluav taws xob thiab kev tiv thaiv ib puag ncig, ua lub luag haujlwm tiv thaiv ib puag ncig.