Hay, Robert K. M. <br/><br/>
An introduction to the physiology of crop yield 

 - New York  John Wiley and Sons, Inc.  1989 
 - 292p.  25cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crops productivity
<br/><br/><label>LC Class. No.: </label>SB112.5.H38