From the Editors. 1

Menzel, B.W., J.B. Barnum, and L.M. Antosch. Ecological alterations of Iowa prairie-agricultural streams. 5

Andrade, F.H. and C.E. LaMotte. A simple physiological model for flower induction involving circadian rhythms and phytochrome. 31

Villalobos-Rodriguez,E., R. Shibles, and D.E. Green. Response of stem termination types of soybean to supplemental irigation. 45

Rupnow, A. and D. Stotlar. In-game coaching behavior of girls' youth softball coaches. 59

Bakken, R.J. and D.F. Stockdale. Influence of teachers' sex on stereotyping school objects and reading attitudes in first-grade boys and girls. 69

Ziomek, R.L. and L.G. Smith. Relationships between philosophical attitudes and personality characteristics. 77

Notes. 93

Book Review. 95