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Thesis (M.S.)—University of Nebraska—Lincoln, 1968. Department of Agronomy.


Copyright 1968, the author. Used by permission.


The aim of this study was to test selection criteria that may correlate with the ability of sorghum [Sorghum bicolor (L.) Moench] to compete with weeds.Selection criteria tested were: (a) Germination percentage and germination rate index, (b) emergence percentage and emergence rate index, (c) seedling vigor, (d) rate of root and shoot development, and (3) cation exchange capacity of roots.Sorghum hybrids and inbred lines were screened accordingly, and then tested in the greenhouse for their competitive ability by growing them in weedy and weed-free environments.A field test was also conducted to evaluate the use of such selection criteria and greenhouse competition studies in selecting competitive sorghum hybrids and parental inbred lines. This research reports studies using these selection criteria to determine the differences in competitiveness of sorghum to weeds.

Advisor: Orvin C. Burnside