I level, distributed widely, found commonly, and the frequency is over 51%; II level, distributed less widely, found less commonly, and the frequency is 31 to 50%; III level, distributed few, found partly, and the frequency is 11 to 30%; IV level, distributed sporadically, found occasionally, and the frequency is low 10%. According to different occurring frequency of M. micrantha, crop yields were measured and analyzed compared to unoccured quadrates of M. micrantha at the same areas.