Application of Participatory Rural Appraisal(PPA) method in the study of species and landscape variations Exploring strategies about ecological improvement based on local responses in northern agro-pastoral ecotone Farmers perception and response towards environmental migration and restoration plans based on participatory rural appraisal: a case study of emigration region in the karst Southwestern China Sustainability evaluation of the Grain for Green Program based on participatory rural appraisal in Wolong Nature Reserve Indigenous evaluation of farmlands: A case study in Shaping Village in Hequ County, Shanxi Province Sustainable development of crop farming in Lingchuan County of Guangxi Research on Grassland Community Management——A Case Study of Yanchi County Evaluation and changing characteristics of fertilizer input in different agricultural systems in the Three Gorges Reservoir Area Farmer‘s perception and response towards grain-for-green program and eco-environment based on participatory rural appraisal Development mechanism of concentrated poverty areas under the sustainable livelihood: The example of the developmentrestricted ecological district of Ningxia, Northwest China.