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Study on the Spatial Pattern of Eggs and Larva-web of Fall Webworm Effect of Sampling Scale on Spatial Variability of Forest Soil Nutrient in Typical Watershed with Miyun Chaoguan West Watershed for example Sampling in quality control of medicinal materials-A case of Epimedium Comparative Study of Monitoring Methods about Plant Diversity and Aboveground Biomass of Alpine Grasslands in the Tibetan Plateau Effects of topographical condition and sampling number on the interpolation precision of forest litter carbon density.


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