Index helps mon­i­tor plants’ progress

Richmond Times-Dispatch - - WEATHER DESK -

The progress of plants can be tracked with a tem­per­a­ture­based index called grow­ing de­gree days, like how cool­ing de­gree days sum up ac­cu­mu­lated en­ergy demand. Richmond’s year-to-date GDD on March 23 was 204: above the nor­mal 123, or more typ­i­cal of April 7.

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