Thanks to chronology, during days, or weeks, may cereals above such lines gradually weaken and bend to the surface, or, also very often, completely wither away and die back.
Shukrani kwa tarehe zake, wakati wa siku, au wiki, inaweza nafaka juu ya mistari vile hatua kwa hatua kudhoofisha na bend kwa uso, au, pia mara nyingi sana, kabisa umenyauka mbali na kufa nyuma.