Coupling relationship of agricultural eco-economic system in Wuqi County based on structural equation model. Operation and demonstration of precision planting in Luancheng County Spatial disparities and the reasons about the impact of the peasant household consumption on environment: based on the survey data of Zhangye city in 2010 Empirical analysis of farmers’ adaptation to climate change in southern rice areas of China— Based on household survey data in Jiangsu and Anhui Provinces Comparison environmental impact of the peasant household in han, zang and hui nationality region:case of zhangye,Gannan and Linxia in Gansu Province Agricultural ecosystem energy flow analysis based on peasant households