This investigation has determined the presence of biological nitrogen fixation in two reservoirs in the southwestern United States: Lake Arlington and Lake Ray Hubbard. Subsequent tests have gathered baseline data on the effects of various biological, chemical, and physical parameters on in situ nitrogen fixation in these reservoirs. Of specific importance is the relationship between nitrogen fixation arid occasional blooms of blue-green algae which produce such problems as testes and odors in these water-supply impoundments.

The problem with which this investigation was concerned was that of surveying the attitudes of parents, teachers, and principals toward parental involvement in school activities. The study had a threefold purpose. The first was to determine the attitudes of parents toward involvement in school activities. The second was to determine the attitudes of teachers and principals toward parental involvement in schools. The third was to identify attitudes of parents, teachers, and principals toward various methods of involvement.

This study investigated the relationship between certain biographical and personality characteristics and decision-making ability of purchasing personnel as measured by the results achieved in a complex management game.

This investigation compares the effectiveness of two methods of teaching production work in beginning typewriting. One method is defined as the traditional approach, which adheres to suggestions and materials for teaching found in current typewriting textbooks. Students are paced, drilled, and timed on straight copy to build speed and accuracy, but not on production work; they usually type from perfectly arranged copy; and they circle their errors for at least half the course. The other method, developed at North Texas State University by Payne and Anderson, is defined as the teacher-directed approach. Students are intensively paced, drilled, and timed by the teacher on short, simple jobs or parts of jobs; they usually type from unarranged copy; they learn to erase errors on production work during the first production unit; and they are evaluated on the basis of the number of mailable items produced during a specific time period.