Characteristics of Citrus Freeze Injury in the Newly-reclaimed Forest from Formland of Three Gorges Area in Hubei Province Biodiversity of main coniferous forests at low elevation of Three Gorges Reservoir area Soil nitrogen balance in citrus orchards of the Three Gorges area in Chongqing Study on the status of agricultural non-pointing source(NPS)pollution in Three-Gorges Area and its control countermeasures Benefit Assessment of Agroforestry Ecosystems in the Three Gorges Reservoir Area Research on the landscape pattern of slopes with different gradients and directions in the area of Three Gorges Area based on 3S—A case study from Wuxi County Soil phosphorus balance in citrus orchards of three gorges area in Chongqing