Advances in agronomy  

 - New York:   Academic Press,   1968 
 - xi, 379p. 
<br/><br/> Vol. 20 1968 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture
<br/><br/><label>Subjects--Index Terms: </label>Fertilizers 
<br/><br/><label>Universal Decimal Class. No.: </label>631(05)