| The main factors which influence planting structure adjustment,such as climate,technique level of agricultural production,economic benefits,and policy etc.in Gansu were discussed.The result shows that the 4 principles must be considered in adjusting the planting structure: taking whole situations into account and arranging all rationally,planning scientifically and guiding according to individual condition, orienting to market and aiming at benefit,carrying out regional development strategy based on the resource characteristic.The scientific theoretical foundation was provided for agricultural development. |