Abstract
A long-term study was conducted at Lethbridge, Alberta, to determine the response of weed populations to various crop rotations and tillage treatments. Weed density and species composition differed with rotation, tillage, and date of sampling within years. Fewer weeds were found in winter wheat-fallow than continuous winter wheat, winter wheat-lentil, or winter wheat-canola rotations. A dense infestation of downy brome developed in the continuous winter wheat rotation. In all rotations, more weeds were present in zero tillage plots than in either minimum or conventional tillage plots. Dandelion and perennial sowthistle densities increased slightly over years in the minimum and zero tillage treatments. Flixweed, field pennycress, wild buckwheat, and common lambsquarters densities decreased in zero till but densities of downy brome, redroot pigweed, and Russian thistle increased. Russian thistle was not well controlled with trifluralin and its density increased in the winter wheat-canola rotation.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Weed density and composition differed with rotation, tillage and sampling date.
- Taxon
- winter wheat
Triticum aestivume1 - Treatment
- rotation, tillage, and date of samplinge0
- Interactor
- Weede0weed
- Outcome
- Weed density and species compositione0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed density and species composition differed with rotation, tillage, and date of sampling within years.”
e1“Russian thistle was not well controlled with trifluralin and its density increased in the winter wheat-canola rotation.”
Claim · model-written summary
Winter wheat-fallow had fewer weeds than the other named rotations.
- Taxon
- winter wheatTriticum aestivume0
- Treatment
- winter wheat-fallowe0
- Interactor
- weedse0weed
- Outcome
- weedse0
- Direction
- Fewere0
- Comparator
- continuous winter wheat, winter wheat-lentil, or winter wheat-canola rotationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fewer weeds were found in winter wheat-fallow than continuous winter wheat, winter wheat-lentil, or winter wheat-canola rotations.”
Claim · model-written summary
Continuous winter wheat developed a dense downy brome infestation.
- Taxon
- winter wheatTriticum aestivume0
- Interactor
- downy brome
Bromus tectorume0weed - Outcome
- dense infestation of downy bromee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A dense infestation of downy brome developed in the continuous winter wheat rotation.”
Claim · model-written summary
Zero tillage had more weeds than minimum or conventional tillage.
- Taxon
- winter wheatTriticum aestivume1
- Treatment
- zero tillagee0
- Interactor
- weedse0weed
- Outcome
- weedse0
- Direction
- moree0
- Comparator
- minimum or conventional tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In all rotations, more weeds were present in zero tillage plots than in either minimum or conventional tillage plots.”
e1“Russian thistle was not well controlled with trifluralin and its density increased in the winter wheat-canola rotation.”
Claim · model-written summary
Dandelion and perennial sowthistle densities rose slightly over years in minimum and zero tillage.
- Taxon
- winter wheatTriticum aestivume1
- Treatment
- minimum and zero tillagee0
- Interactor
- Dandelion and perennial sowthistlee0weed
- Outcome
- Dandelion and perennial sowthistle densitiese0
- Direction
- increased slightlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dandelion and perennial sowthistle densities increased slightly over years in the minimum and zero tillage treatments.”
e1“Russian thistle was not well controlled with trifluralin and its density increased in the winter wheat-canola rotation.”
Claim · model-written summary
Four named weed densities fell under zero tillage.
- Taxon
- winter wheatTriticum aestivume1
- Treatment
- zero tille0
- Interactor
- Flixweede0weed
- Outcome
- Flixweed, field pennycress, wild buckwheat, and common lambsquarters densitiese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flixweed, field pennycress, wild buckwheat, and common lambsquarters densities decreased in zero till”
e1“Russian thistle was not well controlled with trifluralin and its density increased in the winter wheat-canola rotation.”
Claim · model-written summary
Downy brome, redroot pigweed and Russian thistle densities rose under zero tillage.
- Taxon
- winter wheatTriticum aestivume1
- Treatment
- zero tille2
- Interactor
- downy bromeBromus tectorume0weed
- Outcome
- densities of downy brome, redroot pigweed, and Russian thistlee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“densities of downy brome, redroot pigweed, and Russian thistle increased.”
e1“Russian thistle was not well controlled with trifluralin and its density increased in the winter wheat-canola rotation.”
e2“In all rotations, more weeds were present in zero tillage plots than in either minimum or conventional tillage plots.”
Claim · model-written summary
Trifluralin did not control Russian thistle well.
- Taxon
- winter wheatTriticum aestivume1
- Treatment
- trifluraline0
- Interactor
- Russian thistle
Salsola traguse0weed - Outcome
- Russian thistlee0
- Direction
- not well controllede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Russian thistle was not well controlled with trifluralin”
e1“Russian thistle was not well controlled with trifluralin and its density increased in the winter wheat-canola rotation.”
Claim · model-written summary
Russian thistle density increased in the winter wheat-canola rotation.
- Taxon
- winter wheatTriticum aestivume0
- Interactor
- Russian thistleSalsola traguse1weed
- Outcome
- density increasede0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its density increased in the winter wheat-canola rotation.”
e1“Russian thistle was not well controlled with trifluralin and its density increased in the winter wheat-canola rotation.”
The same questions in other papers
tillage · weed · Triticum aestivum (wheat)Results differ
56 papers in the same direction as this paper · 126 in the opposite direction
- positive
- positive
- positive
179 papers more in this group
See all 183 papers →tillage · Bromus tectorum · Triticum aestivum (wheat)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- negative
1 paper more in this group
See all 5 papers →tillage · organism · Triticum aestivum (wheat)Positive and negative results
18 papers in the same direction as this paper · 16 in the opposite direction · 3 reporting no difference from an alternative
- negative
- no effect
- negative
34 papers more in this group
See all 38 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.