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The Structure of Weed Communities in Saskatchewan Fields

Published online by Cambridge University Press:  12 June 2017

Mark R. T. Dale  and
A. Gordon Thomas
Mark R. T. Dale
Affiliation:
Bot. Dep., Univ. Alberta, Edmonton, Alberta, T6G 2E9, Canada
A. Gordon Thomas
Affiliation:
Agric. Can. Res. Stn., Box 440, Regina, Saskatchewan, S4P 3A2, Canada
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Abstract

This paper describes the communities of weeds in cereal and oilseed crops in Saskatchewan, using data collected in a 4-yr survey that sampled more than 400 fields. The survey data for the 40 most common weeds were analyzed in an attempt to distinguish natural groups of weed species and to compare the weed communities associated with the different crops and with different soils. The crops were barley (Hordeum vulgare L.), flax (Linum usitatissimum L.), oats (Avena sativa L.), rape (Brassica campestris L., Brassica napus L.), and wheat (Triticum aestivum L.). Phytosociological association and cluster analysis indicated that the associations of the weed species were more or less independent of the crop, although some differences existed and were determined more by soil or the associated climate. The 40 most common species were divided into three groups related to the soil and climatic subregions of the province.

Keywords

Cluster analysisphytosociological structure
Type
Weed Biology and Ecology
Information
Weed Science , Volume 35 , Issue 3 , May 1987 , pp. 348 - 355
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

Literature Cited

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