Nitrogen in the environment : sources, problems, and management 
edited by J.L. Hatfield and R.F. Follett 
 - 2nd ed 
 - Amsterdam ; Boston  Elsevier / Academic Press  2008 
 - xvi, 702 p. : ill., maps ; 24 cm 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780123743473 
<br/><br/><label>ISSN: </label>2008000469 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrogen fertilizers<br/>Nitrogen fertilizers - Environmental aspects
<br/><br/><label>Dewey Class. No.: </label>631.84 HAT