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

 - 4th ed. 
 - India  Kalyani Publishers  2006 
 - 409 p. 
<br/><br/><label>ISBN: </label>8176638587 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agronomy
<br/><br/><label>Dewey Class. No.: </label>630  / Si643p 2006