Quantitative relationship between leaf nitrogen concentration and canopy reflectance spectra in rice and wheat A Study on the Quantitative Relationship between Pinus Pollen in Surface Sample and Pinus Vegetation Spatial variability and quantitative analysis of field factors based on GIS RELATIONSHIP BETWEEN CANOPY HYPERSPECTRA PARAMETER AND LEAF NITROGEN CONCENTRATION IN COTTON Quantitative analysis on the relationships between cotton fiber quality and meteorological factors Quantitative relationship between precipitation and forest changes in the past 4000 years in China QUANTITATIVE RELATIONSHIP BETWEEN LEAF NITROGEN ACCUMULATION AND CANOPY REFLECTANCE SPECTRA IN RICE AND WHEAT Relationship of Leaf Nitrogen Status to Canopy Reflectance Spectra in Wheat Decomposition of Plant Residue as Influenced by its Lignin and N Itrogen Relationship between Canopy Hyperspectral Index and Leaf Nitrogen Accumulation in Cotton Quantitative Relationship between Leaf Nitrogen Concentration and Canopy Reflectance Spectra