Parent material of Suining group is easy eroded, and the erosionmaterial is of poor cohesion and structure and even easier being eroded by runoff.
遂宁组母质易风化，风化后的碎屑黏聚力弱、结构力差，易遭受径流侵蚀。
2
Tilling can remove weeds and the waste from last season's crops and help break down old plant material into fertilizer. But it can also increase the risk of soil erosion by rain or wind.