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Volume 109, Number 3-4 (2002)

Issue cover date: September-December 2002

Front Matter

Research

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The Unionid Mussels of the Upper Iowa and Turkey River Watersheds
Jim Eckblad, Brett Ostby, and Karis Tenneson

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Soybean Canopy Gap Influence on Velvetleaf Seed Production
Shawn R. Wright, Micheal D. K. Owen, and Douglas D. Buhler

General Interest Article

Science Education

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Science Safety Status in Iowa Schools
Gerlovich A. Jack, Rahul Parsa, Bruce Frana, and Theresa Stiner

Back Matter