Sheaffer, Craig C. <br/><br/>
Introduction to agronomy :  food, crops, and environment / 
Craig C. Sheaffer, Kristine M. Moncada. 
 - second edition. 
 - Clfton Park, NY :  Delmar Cengage Learning,  c2012. 
 - xvi, 704 pages :  colored illustrations, colored maps ;  26 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9781111312336 
<br/><br/><label>LCCN: </label>2011935512 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agronomy.<br/>Food crops.