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A Laboratory Exercise for Teaching Depth of Weed Emergence Concepts

Published online by Cambridge University Press:  20 January 2017

Lance Gibson and
Matt Liebman
Lance Gibson*
Affiliation:
Department of Agronomy, Iowa State University, Ames, IA 50011
Matt Liebman
Affiliation:
Department of Agronomy, Iowa State University, Ames, IA 50011
*
Corresponding author's E-mail: lgibson@iastate.edu
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Abstract

The influence of weed seed burial depth on seedling emergence is a common and important topic in undergraduate weed science courses. A laboratory exercise was developed at Iowa State University to actively demonstrate changes in weed seedling emergence with increased seed-burial depth. Twenty-five ivyleaf morningglory and wild mustard seeds were sown in pots in monoculture, and the number of emerging seedlings was counted for 3 wk. The results from two semesters were analyzed to determine whether the experiment was successful in meeting its intended outcomes. Assessment of student perceptions and attitudes indicated that the activity increased students' understanding of weed biology; improved students' critical thinking, reading, and writing skills; and improved students' ability to make scientific observations, interpret graphical information, and analyze and summarize research data.

Keywords

Ivyleaf morningglory, Ipomoea hederacea (L.) Jacq. # IPOHEwild mustard, Brassica kaber (D.C.) L.C. Wheeler SINARBrassica kabereducationIPOHEIpomoea hederaceaSINARweed biologyweed ecology

Information

Type
Education/Extension
Information
Weed Technology , Volume 18 , Issue 2 , June 2004, pp. 473 - 479
Copyright
Copyright © Weed Science Society of America 

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References

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