weak soil
5.The starch accumulating quantity of all the tested cultivars showed irregular parabola types in difference soils; the strong gluten cultivar did not reach a notable level in different soils, both middle gluten cultivar and weak gluten cultivar gave the largest in the loam soil based on the starch accumulating quantity.
9.The factors included the characters of terranes and weak interbeds and the intersections with slope surface; the characters and combinations of structure joints and the intersections with slope surface; combinations of lithology; dualistic structure of M-shaped slope made up of red rockmass and overlying deposit soil.

