S.S. Singh <br/><br/>
Principles and Practices of Agronomy 

 - 4th Edition. 
 - Ludhiana  Kalyani Publishers  1988 
 - 409p 
<br/><br/>S.S. Singh: Principles and Practices of Agronomy.  (4th Edition.)  Ludhiana.  Kalyani Publishers, 1988. 81-7663-858-7--(630SIN)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>ISBN: </label>81-7663-858-7 
<br/><br/><label>Dewey Class. No.: </label>630  / SIN