Only when the weakening reaches such an extent, the plant stem just above the ground (where, thanks to the lever effect the force is most powerful) can no longer withstand the forces, pressing to it. Most often it is the action of wind, but also may be their own weight of plants.
Wakati tu kudhoofika kavu fika KIWANGO, shina kupanda tu juu ya ardhi (ambapo, shukrani kwa athari lever ni nguvu nguvu zaidi) haiwezi tena kuhimili vikosi, ni kubwa.