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Soybean (Glycine max) Seed Quality and Harvesting Efficiency as Affected by Low Weed Densities

Published online by Cambridge University Press:  12 June 2017

Jeffrey M. Ellis ,
David R. Shaw  and
William L. Barrentine
Jeffrey M. Ellis
Affiliation:
Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762
David R. Shaw
Affiliation:
Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762
William L. Barrentine
Affiliation:
Kumiai Mississippi Research Station, Kumiai Chemical Industry Company, LTD., 2830 Wilcox Road, Leland, MS 38756
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Abstract

With the shift to earlier maturing soybean cultivars, harvest interference data are needed at low weed densities that will not reduce yield, but may affect soybean quality or harvesting efficiency. Field experiments were conducted in 1995 and 1996 to determine the density of five weeds necessary to warrant desiccation treatments. There were no consistent differences in losses of harvestable soybean due to weed density. Common cocklebur increased foreign material and soybean moisture at a greater rate than did hemp sesbania, ivyleaf morningglory, or redroot pigweed, with sicklepod intermediate among these species. Soybean test weight was reduced by 17, 13, and 59 g/L for each plant/meter of row with redroot pigweed, sicklepod, and common cocklebur, respectively, whereas hemp sesbania and ivyleaf morningglory did not affect test weight. However, all species evaluated increased damaged soybean seeds by 8.2 to 11.1% for each plant/meter of row. Combine speed was not affected substantially by the weed densities evaluated.

Keywords

Soybean, Glycine max (L.) Merr. ‘NK 4260’common cocklebur, Xanthium strumarium L. # XANSThemp sesbania, Sesbania exaltata (Raf.) Rydb. ex A. W. Hill # SEBEXivyleaf morningglory, Ipomoea hederacea (L.) Jacq. # IPOHEredroot pigweed, Amaranthus retroflexus L. # AMAREsicklepod, Senna obtusifolia (L.) Irwin and Barnaby # CASOBEarly maturing soybeansoybean gradeAMARECASOBIPOHESEBEXXANST
Type
Research
Information
Weed Technology , Volume 12 , Issue 1 , March 1998 , pp. 166 - 173
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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