Dubey, A <br/><br/>
Food security and soil quality : Chapter 10  Temporal Changesin Productivity ofAgricultural Systemsin Punjab, Indiaand Ohio, USA / 
by A. Dubey and R. Lal ; edited by Rattan Lal and B.A. Stewart. 
 - Boca Raton, FL :  CRC Press,  2010 
 - xiii, 23 pages :   illustrations 
 - Advances in soil sciences .
<br/><br/> Original from book  
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9781439800577 (acidfree paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Food production<br/>Food security.<br/>Soils--Quality.