This paper assesses the productivity of the main plant species used in a reafforestation project in Datong County in Qinghai Province that restores trees to an area originally cleared to grow food crops for hungry poor people. As incomes rose, both the local people, and the nation as a whole, gradually realized that local and regional ecological security is a key to human well-being and the maintenance of civilization. This project is a part of the nationally promoted and locally supported program to plant...