Degree-Days: Growing, Heating, and Cooling
Corn stalks growing in a field
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Keywords

AE428
ABE381
plant growth
models
temperature
insect

How to Cite

Fraisse, Clyde W., and Silvana V. Paula-Moraes. 2018. “Degree-Days: Growing, Heating, and Cooling: ABE381/AE428, Rev. 4/2018”. EDIS 2018 (2). Gainesville, FL. https://doi.org/10.32473/edis-ae428-2018.

Abstract

How much and when it rains, freezes, and thaws can make the difference between boom and bust for a year's crop. However, temperature can predict more than boom or bust. Atmospheric temperature can predict the growth rates of many plants. For this reason, growers use a concept called growing degree-days (GDD), sometimes called heat units. This 5-page document discusses growing degree-days, use of the AgroClimate website to track and forecast GDD accumulation, heating and cooling degree-days, and methods for calculating HDD, CDD, and GDD. Written by Clyde W. Fraisse and Silvana V. Paula-Moraes, and published by the UF/IFAS Department of Agricultural and Biological Engineering, revised December 2010 and April 2018. 
http://edis.ifas.ufl.edu/ae428

https://doi.org/10.32473/edis-ae428-2018
view on EDIS
PDF-2018

References

Cross, H. Z. and M. S. Zuber. 1972. "Prediction of flowering dates in maize based on different methods of estimating thermal units." Agron. J. 64: 351-355. https://doi.org/10.2134/agronj1972.00021962006400030029x

Fraisse, C. W., N. Breuer, J. G. Bellow, V. Cabrera, U. Hatch, G. Hoogenboom, K. Ingram, et al. 2006. "AgClimate: A climate forecast information system for agricultural risk management in the southeastern USA." Computers & Electronics in Agriculture 53(1): 13-27. https://doi.org/10.1016/j.compag.2006.03.002

Gilmore, E. C., Jr. and J. S. Rogers. 1958. "Heat units as a method of measuring maturity in corn." Agron. J. 50: 611-615.

https://doi.org/10.2134/agronj1958.00021962005000100014x

Jarosik, V., A. Honek, R. D. Magarey, and J. Skuhrovec. 2011. "Developmental database for phenology models: Related insect and mite species have similar thermal requirements." Journal of Economic Entomology 104: 1870-1876. https://doi.org/10.1603/EC11247

Klepper, B., R. K. Belford, and R. W. Rickman. 1984. "Root and shoot development in winter wheat." Agron. J. 76: 117-122. https://doi.org/10.2134/agronj1984.00021962007600010029x

McMaster, G. S. and D. E. Smika. 1988. "Estimation and evaluation of winter wheat phenology in the central Great Plains." Agric. Forest Meteorol. 43: 1-18. https://doi.org/10.1016/0168-1923(88)90002-0

McMaster, G. S. and W. W. Wilhelm. 1997. "Growing degree-days: One equation, two interpretations." Agric. Forest Meteorol. 87: 291-300. https://doi.org/10.1016/S0168-1923(97)00027-0

Pedigo, L. P. and M. E. Rice. 2009. Entomology and pest management. New Jersey: Prentice Hall.

Russelle, M. P., W. W. Wilhelm, R. A. Olson, and J. F. Power. 1984. "Growth analysis based on degree days." Crop Sci. 24: 28-32. https://doi.org/10.2135/cropsci1984.0011183X002400010007x

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International (CC BY-NC-ND 4.0) license.