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Uniformity Trials on Germination of Switchgrass Seed¹

Synopsis: Significant differences between tray levels in percent germination were found in 3 of 4 germination environments tested. With the germinator filled to capacity, temperatures in top, middle, and bottom trays varied as much as 4° C. from the intended means. These tests indicate that small differences in environment within a germinator influence the percent germination and that a random replication of seed samples by tray is needed in order to give a better estimate of the germination of a given seed lot.

² Research Agronomist, Agricultural Research Service, USDA; Associate Professor of Mathematics, Oklahoma State University; and Biological Aid, Agricultural Research Service, USDA, respectively.