Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 September 1968
Published in Agron J 60:503-507 (1968)
© 1968 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Effects of Rainfall and Temperature Interactions During the Growing Season on Corn Yield1

E. C. A. Runge2

Maximum daily temperatures and rainfall were found to have a large effect on corn yield from 25 days before to 15 days after anthesis. This corresponds to the average calendar interval of June 30 through August 8 at Urbana. The maximum effect of temperature and rainfall on corn yield occurs approximately one week before anthesis and remains at a high level one week to either side of the maximum. The models solved in this investigation indicate that high temperatures (maximum daily temperatures between 32.2 and 37.8 C or 90 and 100 F) can be beneficial to corn yield if moisture available to the corn plant is adequate.

Key Words: yield determinants • weather • evapotranspiration

1 Contribution from the Department of Agronomy, Illinois Agr. Exp. Sta., Urbana. Presented in part at the joint meeting of Div. S-l, S-6, and A-3, Soil Science Society of America, August 24, 1966, Stillwater, Okla.

2 Associate Professor of Pedology, University of Illinois, Urbana 61801. Acknowledgement and appreciation are expressed to Mr. Charles J. Frazee, Graduate Assistant, University of Ill., Urbana, for writing a program to obtain the results depicted in Fig. 1.

Received for publication February 1, 1968.


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Copyright © 1968 by the American Society of Agronomy.