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Effect of Introducing Biennial Legume Species,Melilotus officinalis,on Plant Community in the Early Stage of Vegetation Succession and Soil Nutrients in the Semiarid Loess Plateau of China Dissolution characteristics of phosphate rocks in latosols withdifferent parent materials in rubber plantations Effect of land use type on profile distribution of glomalin Potassium balance and pool as influenced by long-term fertilization under continuous winter wheat–summer maize cropping system in a manural loess soil Spontaneous determination of soil available phosphorus using highspectrum in the Northwest Plain of Shandong Province Variation of Forest Soil Nutrient Content in Mountainous Areas, Beijing Effects of Rhizosphere Microenvironment on the Root Vigor of Poplars and Transformation of Soil Available P Relationship between leaf phosphorus concentration and soil phosphorus availability across Inner Mongolia grassland SMALL-SCALE SPATIAL CROSS-CORRELATION BETWEEN RAMET POPULATION VARIABLES OF POTENTILLA REPTANSVAR.SERICOPHYLLA AND SOIL AVAILABLE PHOSPHORUS Effects of regulated deficit irrigation on soil phosphorus nutrients in spring wheat field