Historic Accumulation of Chill Hours, Modified Chill Hours, & Chill Units (Utah Model)

Hours below 45° F, Hours between 32° F and 45° F, September 1 through August 31

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Cumulative Chill Hours and Modified Chill Hours

Hours below 45° F, Hours between 32° F and 45° F, November 1 through February 28/29

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Dynamic Model

September 1 through August 31

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for Peaches, Plums and Nectarines

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