Herbage benefiting to the eco-economy, grain production me eting the food demand, and the afforestation having the ecological function dete rmine their roles and development orientation in the hilly agricultural eco-n omy.

• 牧草业开发的生态经济性、粮食生产的战略性和林业建设的生态性，决定了这些行业在山区农业经济中的地位和发展方向。