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Homogeneity Index of Stand Spatial Structure of Mangrove Ecological System The Impacts of New Cultivation Patterns of Incorporating Poplar with Wheat on Wheat Yield and Quality The Studies on Seedling Nursing Techniques of Sonneratia carseolaris and Its Seedling Growth Rhythm A case study on indicator system of urban environmental protection and ecological construction Evaluation on comprehensive benefits of multiple cropping systems on upland red soil Analysis on the evolutionary trends of regional agrometeorological disasters in China