Iowa State College Journal of Science 45.4

Abstract

<p>A review of septate microsporangia in vascular plants. Nels R. Lersten. 487</p> <p>Genetic effects of population size n the reproduction of two heterogeneous maize populations. Eliud Omolo and W.A. Russell. 499</p> <p>Manipulation of crossing over in Zea Mays L. by Actinomycin D¹. James J. Mock. 513</p> <p>Special meteorological data needs or agriculture. R.H. Shaw. 529</p> <p>Age, growth and condition of black crappie Pomoxis nigromaculatus (Le sueur), in Lewis and Clark Lake, South Dakota, 1954 to 1967. C.J. Vanderpuye and K.D. Carlander. 541</p> <p>Life history of red shiners, Notropis lutrensis, in the Skunk River, central Iowa. K.D. Laser an K.D. Carlander. 557</p> <p>Influence of plant height, row width, and plant population on grain yield and yield component associations in grain sorghum. R.E. Atkins and Ricardo Martinez. 563</p> <p>Change in genetic variance for seven plant and ear traits after four cycles of reciprocal recurrent selection for yield in maize. Arnel R. Hallauer. 575</p> <p>Carbohydrate metabolism an respiratory activity of soybean seedlings. Abdul H. Wahab and J.S. Burris. 595</p> <p>Duration of stigma receptivity in cytoplasmic-genic male-sterile grain sorghums. R.E. Atkins. 607</p> <p>A comparison of soil and air temperatures in the spring at Ames, Iowa. R.H. Shaw. 613</p>