+A **Heat Unit** is a metric used primarily in [agriculture](/wiki/agriculture) to quantify the cumulative heat available for plant development over a season. It typically represents the sum of daily mean temperatures exceeding a specific [base temperature](/wiki/base_temperature), crucial for predicting crop growth stages and harvest times.
+## See also
+- [Growing degree-day](/wiki/growing_degree-day)
+- [Plant phenology](/wiki/plant_phenology)
+- [Crop modeling](/wiki/crop_modeling)
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