glebe
1.Then it analyses the different function of irrigation projects as glebe ,paddy field, farmland in the Xia, Shang and Western Zhou Dynasties, further proves the irrigation works of southern paddy field area is earlier than north drying farming area, so the north irrigation project technology is from southern China.
2.The article indicates that there are three theoretical frames on environmental problems, i.e. the externality and social welfare, tragedy of public glebe and environmental property right, model of substance conservation and the sustainable development plan.
