Hay, Robert K. M. <br/><br/>
The physiology of crop yield / 
Robert K.M. Hay and John R. Porter . 
 - 2nd ed. 
 - Oxford :  Blackwell ,  2006 
 - xiii, 314 p. :  ill., maps ;  25 cm. 
<br/><br/>Includes bibliographical references (p. 277- 307) and index. 
<br/><br/><label>ISBN: </label>9781405108591 1405108592 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crops-- Physiology.<br/>Crop yields.
<br/><br/><label>Dewey Class. No.: </label>633