USGS

Reconnaissance of the occurrence of agricultural chemicals in ground water in Haywood, Lake, Obion and Shelby Counties, Tennessee

U.S. Geological Survey, Water Resources Investigations Report 90-4064

by Dorothea Withington Hanchar


Table of Contents

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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