Iowa State Journal of Research



A new genus and species of diplogyniid from Nicaragua (order Acarina, family Diplogyniidae). Ellis A. Hicks. 103

Solids-water-air space relations of some Iowa soils. D.R. Nielsen, Don Kirkham, and W.C. Burrows. 111

Equivalence of norms. Bernard Vinograde. 117

Trolene and Dowco 109 as feed additive for grub control. Frank E. French and Earle S. Raun. 119

Field tests with the fungus Beauveria sp. for control of the European corn borer. George T. York. 123

Particle numbers of granulated carriers in relation to European corn borer control. J.A. Harding, M.L. Fairchild, T.A. Brindley, and H.C. Cox. 131

A proportioning furnace temperature controller. Harry J. Svec, Alvin A. Read an Dale W. Hilker. 139

An application of programming in testing efficiency of leasing systems. Earl O. Heady and Alvin C. Egbert. 145

Linear programming with variable restraints. Herman O. Hartley and Laurel D. Loftsgard. 161

Relation of solar radiation measurements at Ames to sunshine observations at Des Moines. Angelito Sandoval and Robert H. Shaw. 173

Climatic races in Guatemalan maize. John M. Green. 18

Molecular weight of taka-amylase B. Paul A. Hartman, William F. Harrington, and Malcolm A. Rougive. 199

Vertical distribution of Pythium graminicolum in soil. George Knaphus and W.F. Buchholtz. 201

Time and frequency of recovery of Pythium debaryanum and Pythium graminicolum from roots of growing barley seedlings. T.E. Summers and W.F. Buchholtz. 209

List of Staff Member Publications. 219