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Accumulated heat units for classifying corn hybrid maturity


, : Accumulated heat units for classifying corn hybrid maturity. Agronomy Journal 65(5): 743-747

In a study to determine whether accumulated heat unit (AHU) methods were superior to the calendar-day method for classifying the maturity of maize hybrids and predicting the occurrence of phenological events, 3 maize hybrids were sown in 1969-70 at weekly intervals at 7 widely dispersed and climatically different sites, and calendar days and AHU, calculated by 6 methods, were determined from sowing to tasselling and silking and to 40-25% grain moisture and black layer formation.

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