| These may be the best teeth for hard or rocky soil and for heavy infestations of quackgrass and other weeds with underground rhizomes. |
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| Herbaceous perennials, such as quackgrass, mugwort, and Canada thistle, die back to the ground each year. |
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| Perennial grasses such as bluegrass and quackgrass and broadleaves such as Canada thistle, bindweed, and curly dock also could be addressed with the weed control program. |
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| Fields with quackgrass, Canada thistle, and other cool-season perennial weeds will almost always require the use of glyphosate around the time of planting. |
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| In particular, perennial broadleafs and grasses such as dandelion, curly dock, Canada thistle, and quackgrass are much easier to manage prior to planting a forage crop. |
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| Likewise unwanted grasses like Bermuda, and weeds like dallisgrass and quackgrass that invade a lawn are hard to remove. |
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| Then we have quackgrass and nutsedge, which are undesirable perennial grasses. |
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| I reclaimed a former sheep and goat lot this spring here at Carlson Farm for new garden space, and it was a major battle with quackgrass and Canada thistles. |
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