| Abstract |
Growing degree days (GDD) is a parameter calculated as the average daily temperature less a predetermined base temperature. It is useful when maize growing periods are compared between locations or seasons that differ markedly in temperature, allowing maturities to be standardized because GDD gives a quantitative measure of ambient environmental heat available to support plant growth. This publication reports GDD for the four CIMMYT Experiment Stations: El Batan, Poza Rica, Tlatizapan, and Toluca |
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