Singh, S.S.  x <br/><br/>
Principles and practice of agronomy  x 

 - 4th rev ed 
 - New Delhi  Kalyani Pub  2004 
 - 409 
<br/><br/>x 
<br/><br/><label>ISBN: </label>8176638587 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture Agriculture 
<br/><br/><label>Dewey Class. No.: </label>630/S617p