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A Method for Assessing Herbicide Performance in Small Plot Experiments

A. S. Hamill, P. B. Marriage and G. Friesen
Weed Science
Vol. 25, No. 5 (Sep., 1977), pp. 386-389
Stable URL: http://www.jstor.org/stable/4042796
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
A Method for Assessing Herbicide Performance in Small Plot Experiments
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Abstract

A method is described that provides an accurate and useful assessment of herbicide performance in small plot experiments. This method is an extension of previous rating systems and provides an assessment of the control of individual species through an estimation of the percentage that each contributes to the total broadleaf or grass weed cover on the whole plot area. It permits data collection on individual weed species but is less time-consuming than counting individual plants and it takes into account the size and vigor of individual weed plants as well as their relative abundance. Further, the system allows tabulation of data from across the entire plot rather than from small areas within the plot. The data can be readily entered into various computerized retrieval systems.

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