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Identifying organic matter sources using isotopic ratios in a watershed impacted by intensive agricultural activities in Northeast China

Organic GeochemistryBiogeochemistryEnvironmental MonitoringEngineeringEnvironmental EngineeringNortheast ChinaSoil Organic MatterEnvironmental PollutionSoil ChemistryWater QualityEnvironmental AnalysisIntensive Agricultural ActivitiesOrganic Matter Sources