Abstract
The effect of fertilizer application and three rotations (continuous cropping, fallow-wheat, and fallow-wheat-wheat rotations) on the species composition of the weed community was examined using rotations that had been running for 21–22 yr at Indian Head, Saskatchewan. Before spring seeding, stinkweed and lamb’s-quarters were more abundant on wheat after fallow than they were on either wheat following wheat after fallow or on continuous cropping. After seeding, continuous cropping produced the largest weed densities of green foxtail, thyme-leaved spurge, and vetch. In most instances, Canada thistle was most abundant on continuously cropped and nonfertilized plots. After spring seeding, green foxtail was the only species with a larger density on fertilized plots. Interactions between fertilizer application and rotation, and among species, influenced species composition in the weed community. Fertilizer application tended to reduce community differences between continuous cropping and short-term wheat-fallow rotations. Allelopathic effects of Canada thistle may have reduced green foxtail and redroot pigweed densities. With the use of 2-or 3-yr wheat-fallow rotations and herbicide application, weed problems can be minimized in southeastern Saskatchewan.
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Claims 8
Claim · model-written summary
Before spring seeding, stinkweed and lamb’s-quarters were more abundant on wheat after fallow than on continuous cropping.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- wheat after fallowe1
- Interactor
- stinkweed and lamb’s-quarterse1weed
- Outcome
- more abundante1
- Direction
- moree1
- Comparator
- continuous croppinge1
- Setting
- Indian Head, Saskatchewane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rotations that had been running for 21–22 yr at Indian Head, Saskatchewan”
e1“Before spring seeding, stinkweed and lamb’s-quarters were more abundant on wheat after fallow than they were on either wheat following wheat after fallow or on continuous cropping”
Claim · model-written summary
After seeding, continuous cropping produced the largest weed densities of green foxtail, thyme-leaved spurge and vetch.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- continuous croppinge2
- Interactor
- green foxtail, thyme-leaved spurge, and vetche2weed
- Outcome
- weed densitiese2
- Direction
- largeste2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“THE LONG-TERM EFFECTS OF FERTILIZER APPLICATION AND THREE ROTATIONS ON WEED COMMUNITIES IN WHEAT (AFTER 21–22 YEARS AT INDIAN HEAD, SASKATCHEWAN)”
e2“After seeding, continuous cropping produced the largest weed densities of green foxtail, thyme-leaved spurge, and vetch”
Claim · model-written summary
In most instances, Canada thistle was most abundant on continuously cropped and nonfertilized plots.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- continuously croppede3
- Interactor
- Canada thistle
Cirsium arvensee3weed - Outcome
- abundante3
- Direction
- moste3
- Qualifier
- In most instancese3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“THE LONG-TERM EFFECTS OF FERTILIZER APPLICATION AND THREE ROTATIONS ON WEED COMMUNITIES IN WHEAT (AFTER 21–22 YEARS AT INDIAN HEAD, SASKATCHEWAN)”
e3“In most instances, Canada thistle was most abundant on continuously cropped and nonfertilized plots”
Claim · model-written summary
After spring seeding, green foxtail was the only species with a larger density on fertilized plots.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- fertilized plotse4
- Interactor
- green foxtaile4weed
- Outcome
- densitye4
- Direction
- largere4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“THE LONG-TERM EFFECTS OF FERTILIZER APPLICATION AND THREE ROTATIONS ON WEED COMMUNITIES IN WHEAT (AFTER 21–22 YEARS AT INDIAN HEAD, SASKATCHEWAN)”
e4“After spring seeding, green foxtail was the only species with a larger density on fertilized plots”
Claim · model-written summary
Fertilizer application and rotation interacted to influence species composition of the weed community.
- Taxon
- WHEATTriticum aestivumt0
- Outcome
- species composition in the weed communitye5
- Qualifier
- Interactions between fertilizer application and rotatione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“THE LONG-TERM EFFECTS OF FERTILIZER APPLICATION AND THREE ROTATIONS ON WEED COMMUNITIES IN WHEAT (AFTER 21–22 YEARS AT INDIAN HEAD, SASKATCHEWAN)”
e5“Interactions between fertilizer application and rotation, and among species, influenced species composition in the weed community”
Claim · model-written summary
Fertilizer application tended to reduce community differences between continuous cropping and short-term wheat-fallow rotations.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- Fertilizer applicatione6
- Outcome
- community differencese6
- Direction
- reducee6
- Comparator
- short-term wheat-fallow rotationse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“THE LONG-TERM EFFECTS OF FERTILIZER APPLICATION AND THREE ROTATIONS ON WEED COMMUNITIES IN WHEAT (AFTER 21–22 YEARS AT INDIAN HEAD, SASKATCHEWAN)”
e6“Fertilizer application tended to reduce community differences between continuous cropping and short-term wheat-fallow rotations”
Claim · model-written summary
Allelopathic effects of Canada thistle may have reduced green foxtail and redroot pigweed densities.
- Taxon
- WHEATTriticum aestivumt0
- Interactor
- green foxtaile7weed
- Second interactor
- Canada thistleCirsium arvensee7weed
- Outcome
- green foxtail and redroot pigweed densitiese7
- Qualifier
- Allelopathic effects of Canada thistlee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“THE LONG-TERM EFFECTS OF FERTILIZER APPLICATION AND THREE ROTATIONS ON WEED COMMUNITIES IN WHEAT (AFTER 21–22 YEARS AT INDIAN HEAD, SASKATCHEWAN)”
e7“Allelopathic effects of Canada thistle may have reduced green foxtail and redroot pigweed densities”
Claim · model-written summary
Weed problems can be minimized in southeastern Saskatchewan with 2- or 3-yr wheat-fallow rotations and herbicide application.
- Taxon
- wheatTriticum aestivume7
- Treatment
- 2-or 3-yr wheat-fallow rotations and herbicide applicatione7
- Outcome
- weed problems can be minimizede7
- Setting
- southeastern Saskatchewane7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“With the use of 2-or 3-yr wheat-fallow rotations and herbicide application, weed problems can be minimized in southeastern Saskatchewan”
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See all 84 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.