Xi Qi- (8) with terms containing two (or more) rate constants as factors. A calculation to the second approximation is given in a previous paper (3).
APPLICATIONSThe method described above is of special value for the analysis of a solution containing a number of solutes which fulfill the following conditions:All solutes must contain the same tracer isotope, which must be in radioactive equilibrium with respect to the different solutes.A solvent must be found, into which Qi
Survival percentages of Trifolium nanum seedlings in Colorado at 3,932 m altitude were 82.1, 55.8, and 27.5, respectively, at the end of the first, second, and third summers. Data on seedling substrates and growth are also presented.
The nature of achene dormancy was studied in two species of alpine sedges, Carex albonigra and C. ebenea, from the Rollins Pass area of the Colorado Front Range. Germination response of achenes was determined under various treatments, including stratification, scarification, leaching, extraction, exposure to light, and application of various plant growth regulators. Two distinctly different requirements for seed germination are exhibited by the two species. In C. albonigra, only scarification at the basal end of the achenes resulted in germination. Only fluorescent and red light were effective in promoting germination in C. ebenea achenes, suggesting a reversible photoreaction as the mechanism responsible for dormancy in this species. The light effect was apparently cumulative, with a minimum of about 15 days of continuous light being required for the initiation of germination.
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