Volume 91, Number 4 (1984)
Issue cover date: December 1984
Front Matter
Research
Solar Radiation in Iowa: The Historical Record
Laurent Hodges
Performance of Sorghum Hybrids in Relation to Sources of Resistance to Biotype C of the Greenbug
T. F. Kwolek, R. E. Atkins, and O. S. Smith
Status of Four Orchid Species at Silver Lake Fen Complex
Sara Carroll, Robert L. Miller, and Paul D. Whitson
Late-Winter Abundance and Substrate Associations of Benthos in Pool 13, Upper Mississippi River
Wayne A. Hubert, Gene E. Darnell, and Daniel E. Dolk