Document Type

Other

Publication Date

9-1-1995

Keywords

corn hybrid maturity, maturity rating, growing degree day (gdd), relative maturity (rm)

Extension Number

ExEx 8116

Department

Plant Science

Description

In recent years, delayed seeding and replanting following killing spring frosts have caused many corn growers to consider whether they are using the right maturity rating system to select the proper hybrid maturity for their area. The most common methods for rating corn hybrid maturity include: • The “relative maturity” (RM) rating system • The “growing degree day” or “heat unit” system (GDD)

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