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Determining Seed Performance of Frost-Damaged Maize Seed Lots

^a Iowa State Univ., 166 Seed Science Center, Ames, IA 50011
^b Iowa State Univ., Agronomy Hall, Ames, IA 50011. This journal paper of the Iowa Agricultural and Home Economics Experiment Station, Ames, Project no. 3638, was supported by the Hatch Act, State of Iowa Funds

View larger version (12K): [in this window] [in a new window]   Figure 1. Artificial frost cycle developed to mimic an autumn severe killing frost in the Midwest. Segment 1 cooling rate is –1°C h–1 from 10 to 9°C, Segment 2 cooling rate is –1.4°C h–1 from 9 to 0°C, Segment 3 cooling rate is –0.83°C h–1 from 0 to –5°C, Segment 4 is a constant –5°C for 2 h, Segment 5 thawing rate is 4.7°C h–1 from –5 to 9°C, and Segment 6 thawing rate is 1°C h–1 from 9 to 10°C.