Abstract
Field studies were conducted from 1990 through 1997 to evaluate the long-term effect of 2- and 3-yr rotations on the control of downy brome, jointed goatgrass, and feral rye in winter wheat. At the completion of the study, jointed goatgrass and feral rye densities averaged 8 plants/m 2 and < 0.1 plant/m 2 for the 2- and 3-yr rotations, respectively. Downy brome densities averaged < 0.5 plant/m 2 for both the 2- and 3-yr rotations, with no treatment differences observed. Winter annual grasses were not eradicated after two cycles of the 3-yr rotations, but weed densities were reduced 10-fold compared to densities after one cycle and more than 100-fold compared with the 2-yr rotations. Wheat grain contamination with dockage and foreign material followed a similar trend. The 3-yr rotations were economically competitive with 2-yr rotations and provided superior control of the winter annual grass weeds.
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Claims 9
Claim · model-written summary
Jointed goatgrass density averaged 8 plants/m 2 across rotations.
- Taxon
- Winter Wheat
Triticum aestivumt0 - Interactor
- jointed goatgrasse0weed
- Outcome
- jointed goatgrasse0
- Value
- 8 plants/m 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“jointed goatgrass and feral rye densities averaged 8 plants/m 2 and < 0.1 plant/m 2 for the 2- and 3-yr rotations, respectively”
t0“Winter Wheat”
Claim · model-written summary
Feral rye density averaged less than 0.1 plant/m 2 across rotations.
- Taxon
- Winter WheatTriticum aestivumt0
- Interactor
- feral ryee0weed
- Outcome
- feral rye densitiese0
- Value
- < 0.1 plant/m 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“jointed goatgrass and feral rye densities averaged 8 plants/m 2 and < 0.1 plant/m 2 for the 2- and 3-yr rotations, respectively”
t0“Winter Wheat”
Claim · model-written summary
Downy brome density was below 0.5 plant/m 2 for both rotation lengths with no treatment difference.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- 2- and 3-yr rotationse0
- Interactor
- Downy brome
Bromus tectorume0weed - Outcome
- Downy brome densitiese0
- Direction
- no treatment differencese0
- Value
- < 0.5 plant/m 2e0
- Comparator
- both the 2- and 3-yr rotationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Downy brome densities averaged < 0.5 plant/m 2 for both the 2- and 3-yr rotations, with no treatment differences observed.”
t0“Winter Wheat”
Claim · model-written summary
Winter annual grasses persisted after two cycles of three-year rotations.
- Taxon
- Winter WheatTriticum aestivumt0
- Interactor
- Winter annual grassese0weed
- Outcome
- Winter annual grasses were not eradicatede0
- Qualifier
- after two cycles of the 3-yr rotationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter annual grasses were not eradicated after two cycles of the 3-yr rotations”
t0“Winter Wheat”
Claim · model-written summary
Weed density after two three-year cycles was tenfold lower than after one cycle.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- two cycles of the 3-yr rotationse0
- Interactor
- Winter annual grassese0weed
- Outcome
- weed densitiese0
- Direction
- reducede0
- Value
- 10-folde0
- Comparator
- densities after one cyclee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter annual grasses were not eradicated after two cycles of the 3-yr rotations, but weed densities were reduced 10-fold compared to densities after one cycle”
t0“Winter Wheat”
Claim · model-written summary
Weed density after three-year rotations was over 100-fold lower than after two-year rotations.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- weed densitiese0
- Direction
- reducede0
- Value
- more than 100-folde0
- Comparator
- 2-yr rotationse0
Not reportedInteractorInteractor roleTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weed densities were reduced 10-fold compared to densities after one cycle and more than 100-fold compared with the 2-yr rotations”
t0“Winter Wheat”
Claim · model-written summary
Wheat grain contamination with dockage and foreign material followed the weed density trend.
- Taxon
- WheatTriticum aestivume0
- Outcome
- grain contamination with dockage and foreign materiale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat grain contamination with dockage and foreign material followed a similar trend.”
Claim · model-written summary
Three-year rotations were economically competitive with two-year rotations.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- economically competitive with 2-yr rotationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 3-yr rotations were economically competitive with 2-yr rotations”
t0“Winter Wheat”
Claim · model-written summary
Three-year rotations controlled winter annual grass weeds better than two-year rotations.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- 3-yr rotationse0
- Interactor
- winter annual grass weedse0weed
- Outcome
- control of the winter annual grass weedse0
- Direction
- superiore0
- Comparator
- 2-yr rotationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 3-yr rotations were economically competitive with 2-yr rotations and provided superior control of the winter annual grass weeds.”
t0“Winter Wheat”
The same questions in other papers
rotation · Bromus tectorum · Triticum aestivum (wheat)Positive and negative results
2 reporting no difference from an alternative
- positive
- positive
rotation · weed · Triticum aestivum (wheat)Positive and negative results
18 papers in the same direction as this paper · 16 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
- negative
33 papers more in this group
See all 37 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.