Models of Dynamic Balance Between Cultivated Land Demands and Supplies at Multi-scales

Based on the multi-scale features of the balance, this paper presents a multi-scale measurement for the dynamic balance between cultivated land demands & supplies and gives some detailed discussion on the basic models for the balance at the scales of total amount, per capita capacity, quality, time and space. Finally, this paper puts forward an adjust-control model to achieve the balance under the framework of land use planning.