Table 3.

Keys generated to relate datasets.

Key name	Purpose	File name(s)
USGS-USDA crop keys	Relate USDA crop names/data items to surveyed crops and crop groups in the USGS pesticide dataset	crop_key_summary.csv
		crop_key_summary_CA.csv
USGS-CASRN compound key	Relate compound names in the USGS pesticide dataset to CAS Registry Numbers for comparison to other datasets	USGS_Pesticide-CASRN.csv
USGS compound -category key	Categorize compounds by type (insecticide, fungicide, herbicide) and mode-of-action group	USGS_Pesticide-Category.csv
USGS-USDA compound key	Relate compound names in the USGS pesticide dataset to pesticide-related data items in USDA Agricultural Chemical Use Survey.	usda_usgs_pesticide_names.csv
USGS-CDL land use-land cover keys	Relate crop groups from the USGS pesticide dataset to land cover classes in the USDA Cropland Data Layer	cdl_reclass.csv
		cdl_reclass_CA.csv