Tissue Structure and Near-infrared Reflectivity and Their Affecting Factors of Flue-cured Tobacco Leaves Relationship between indices of growth, physiology and reflectivity and yield of winter wheat under water stress Spontaneous determination of soil available phosphorus using highspectrum in the Northwest Plain of Shandong Province Monitoring influence of different fertilization decision treatments on winter wheat growth using hyperspectral spectrum and comparative analysis Reflectivity of broad-leaved Korean pine forest in growing season on Changbai Mountain