by Dorothea Withington Hanchar
Abstract
Introduction
Purpose and scope
Previous investigations
Acknowledgments
Physiographic and geologic setting
Land use and chemical application
Collection of hydrologic data
Occurrence of agricultural chemicals in ground water
Pesticides
Nitrogen species
Nitrite plus nitrate
Ammonia plus organic nitrogen
Ammonia
Seasonal variations in concentrations of agricultural chemicals
Summary and conclusions
Selected references
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