Physiological aspect of crop yeild/ 
Jerry, D. Eastein, F.A. Haskins 
 - Winconsin  American Society OF agronomy  1969 
 - xx,396p. :  ill. ;Hbk 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant physiology<br/>Crops
<br/><br/><label>LC Class. No.: </label>QK711 .P4  / 1969