Sparks, Donald L <br/><br/>
Advances in agronomy. Vol.61. 

 - San Diego  Academic Press  1997 
 - ix,281 p. 
<br/><br/><label>ISBN: </label>0120007614 
<br/><br/><label>Subjects--Topical Terms: </label><br/>AGRICULTURE
<br/><br/><label>Dewey Class. No.: </label>630  / ADV