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Prediction of soil organic matter in northwestern China using fractional-order derivative spectroscopy and modified normalized difference indices

Organic GeochemistryEnvironmental ChemistryBiogeochemistryEnvironmental MonitoringEngineeringSoil PropertySoil Organic MatterSoil ChemistryAnalytical ChemistryGeochemistryDifference IndicesFractional-order Derivative SpectroscopyEarth Science