Harden, Stephen L. <br/><br/>
Ionic composition and nitrate in drainage water from fields fertilized with different nitrogen sources, Middle Swamp watershed, North Carolina, August 2000-August 2001 
by Stephen L. Harden and Timothy B. Spruill ; prepared in cooperation with the North Carolina Department of Environment and Natural Resources, Division of Water Quality, Groundwater Section. 
 - [Reston, Va.]  U.S. Geological Survey  2004. 
 - iv, 14 p.  ill. (some col.), col. maps  28 cm. 
 - Scientific investigations report  2004-5123 .
<br/><br/> Shipping list no.: 2004-0266-P. 
<br/><br/>Includes bibliographical references (p. 12-14). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrates--Environmental aspects--North Carolina--Middle Swamp Watershed (Pitt County)<br/>Water--Pollution--North Carolina--Middle Swamp Watershed (Pitt County)<br/>Drainage--Environmental aspects--North Carolina--Middle Swamp Watershed (Pitt County)
<br/><br/><label>GPO Item No.: </label>0624-B-02 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 19.42/4-4:2004-5123