Abstract
This study characterized seedling emergence of downy brome from August to early December over a 6-yr period. Seedlings were counted weekly in quadrats established in winter wheat stubble at Akron, CO. Seedling emergence varied among years, which was caused by erratic seasonal precipitation. Producers delay planting of winter wheat to reduce downy brome density in the crop, but in only 1 yr out of 6 would producers have benefited from this control strategy. Furthermore, delayed planting has negative crop consequences: less grain yield and more susceptibility to plant diseases and wind erosion because of less fall plant growth. Because fall precipitation is erratic in the semiarid Great Plains, other control strategies, such as nitrogen placement and increased seeding rates of winter wheat, would be more effective for downy brome management, yet not detrimental to winter wheat production.
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Claims 6
Claim · model-written summary
Downy brome seedling emergence varied among years.
- Taxon
- Bromus tectorum
Bromus tectorumt0 - Outcome
- Seedling emergencee0
- Setting
- winter wheat stubble at Akron, COe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Downy Brome (Bromus tectorum) Emergence Variability in a Semiarid Region”
e0“Seedling emergence varied among years, which was caused by erratic seasonal precipitation”
e1“Seedlings were counted weekly in quadrats established in winter wheat stubble at Akron, CO”
Claim · model-written summary
Downy brome seedling emergence variation among years was attributed to erratic seasonal precipitation.
- Taxon
- Bromus tectorumBromus tectorumt0
- Outcome
- Seedling emergencee0
- Qualifier
- erratic seasonal precipitatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Downy Brome (Bromus tectorum) Emergence Variability in a Semiarid Region”
e0“Seedling emergence varied among years, which was caused by erratic seasonal precipitation”
Claim · model-written summary
Delaying winter wheat planting would have benefited producers in only 1 year out of 6 as a downy brome control strategy.
- Taxon
- winter wheat
Triticum aestivume2 - Treatment
- delay planting of winter wheate2
- Outcome
- benefited from this control strategye2
- Direction
- benefitede2
- Qualifier
- in only 1 yr out of 6e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Downy Brome (Bromus tectorum) Emergence Variability in a Semiarid Region”
e2“Producers delay planting of winter wheat to reduce downy brome density in the crop, but in only 1 yr out of 6 would producers have benefited from this control strategy”
Claim · model-written summary
Delayed planting of winter wheat reduced grain yield.
- Taxon
- winter wheatTriticum aestivume2
- Treatment
- delayed plantinge3
- Outcome
- grain yielde3
- Direction
- lesse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Downy Brome (Bromus tectorum) Emergence Variability in a Semiarid Region”
e2“Producers delay planting of winter wheat to reduce downy brome density in the crop, but in only 1 yr out of 6 would producers have benefited from this control strategy”
e3“Furthermore, delayed planting has negative crop consequences: less grain yield and more susceptibility to plant diseases and wind erosion because of less fall plant growth”
Claim · model-written summary
Delayed planting of winter wheat increased susceptibility to plant diseases and wind erosion.
- Taxon
- winter wheatTriticum aestivume2
- Treatment
- delayed plantinge3
- Outcome
- susceptibility to plant diseases and wind erosione3
- Direction
- moree3
- Qualifier
- because of less fall plant growthe3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Downy Brome (Bromus tectorum) Emergence Variability in a Semiarid Region”
e2“Producers delay planting of winter wheat to reduce downy brome density in the crop, but in only 1 yr out of 6 would producers have benefited from this control strategy”
e3“Furthermore, delayed planting has negative crop consequences: less grain yield and more susceptibility to plant diseases and wind erosion because of less fall plant growth”
Claim · model-written summary
Nitrogen placement and increased seeding rates of winter wheat would be more effective for downy brome management without being detrimental to winter wheat production.
- Taxon
- winter wheatTriticum aestivume4
- Treatment
- nitrogen placement and increased seeding ratese4
- Outcome
- downy brome managemente4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Downy Brome (Bromus tectorum) Emergence Variability in a Semiarid Region”
e4“Because fall precipitation is erratic in the semiarid Great Plains, other control strategies, such as nitrogen placement and increased seeding rates of winter wheat, would be more effective for downy brome management, yet not detrimental to winter wheat production”
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