Spatial and temporal variation of surface water vapor over northern and southern regions of Qinling Mountains Spatial and temporal variations of total nitrogen density in agricultural soils of the Songnen Plain Maize Belt REVIEW OF SPATIAL AND TEMPORAL VARIATIONS OF SOIL RESPIRA- TION AND DRIVING MECHANISMS The ecological footprint distance of food consumed in Beijing Spatial and temporal variation of absolute humidity and its relationship with potential evaporation in the northern and southern regions of Qinling Mountains Quantitative analysis of relationships between spatial and temporal variation of soil moisture content and environmental factors at a gully catchment of the Loess Plateau Analysis the temporal and spatial change of regional agriculture ecological economic in Jiangsu Province Monitoring changes of soil organic matter and total nitrogen in cultivated land in Guangxi by remote sensing Dynamic Monitoring of Vegetation Coverage in Three Gorges Reservoir Area Based on MODIS NDVI Temporal and spatial patterns of diversity and community structure of culturable endophytic bacteria isolated from Populus euphratica within the rivers of the Tarim basin RESEARCH AND PROSPECTS FOR SOIL RESPIRATION OF FARMLAND ECOSYSTEMS IN CHINA The spatial and temporal variations of maximum light use efficiency and possible driving factors of Croplands in Jiangsu Province Spatial and Temporal Variations of Water Poten tia l of theMa in Tree Spec iesfor Vegeta tion Restora tion in the Dry-hot Va lleys of the Jin sha River