Poyerekeza ndi ADC wamba, wothira thovu ali ndi ubwino wovunda wathunthu, kuchepa kwapang'onopang'ono kwa chinthu chotulutsa thovu, komanso kupanga mpweya wothandiza kwambiri.Kuchuluka kowonjezera: pafupifupi 1-3%, kuchuluka kwa thovu kumatha kuzindikirikanso molingana ndi kachulukidwe ka thovu, komwe kumatha kuonjezeredwa kapena kuchepetsedwa moyenera.