Nuttonson, Michael Y. ,  1904- <br/><br/>
A comparative study of lower and upper limits of temperature in meas uring the variability of day-degree summations of wheat, barely, and ry e. 

 - Washington :  American Institute of Crop Ecology,  1956. 
 - ii, 42 p. :  tables ;  27 cm. 
<br/><br/> "Sponsored by the United States Weather Bureau under contract Cwb-87 37" 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wheat.<br/>Barley.<br/>Rye.<br/>Plants--Effect of temperature on.
<br/><br/><label>Dewey Class. No.: </label>633.1