Fluctuations in abundance and distribution of common Clear Lake fishes as suggested by gillnet catch. Ross V. Bulkley. 413

Influence of sample size on the estimation of genetic variance in a variety of maize. II. Plant and ear characters. Fidel Marques-Sanchez and Arnel R. Hallauer. 423

Waterfowl in relation to land use and water levels on the Spring Run Area. Gary L. Krapu, David R. Parsons and Milton W. Weller. 437

An evaluation of techniques for inducing male sterility in oats. R.C. Frohberg and K.J. Frey. 453

Age and growth of white bass from Pool 19 of the Mississippi River. Douglas W. Pelren. 471

Audience analysis of a university-sponsored agricultural magazine. John A Wallize, JR. 481

Legumes of the United States: II. Desmanthus and Neptunia. Duane Isely 495.

Effects of gibberellic acid and post-harvest age on germination of prairie grasses. Daniel Svedarsky and C.L. Kucera. 513