Hay, Robert K.M. <br/><br/>
The Physiology of crop yield 
Robert K M Hay, John R Porter. 
 - 2nd. ed.. 
 - Oxford  Blackwell Publishing  c2006. 
 - xiii, 314 p.: ill.; 25 cm. 
<br/><br/><label>ISBN: </label>9781405108592 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crops - Physiology Crop yields. 
<br/><br/><label>Dewey Class. No.: </label>633  / H44P