Abstract
Foxtail barley (Hordeum jubatum L.) is becoming a more severe weed problem as conservation tillage becomes widely adopted on the southern Canadian prairies. A 5-yr field study was conducted to determine the combined effects of tillage, N rate, N placement and application timing of glyphosate to manage foxtail barley in spring wheat. Wide-blade tillage conducted in fall and spring, compared to zero-till, reduced foxtail barley biomass and seed production in all yr and increased wheat yield in 4 of 5 yr. Foxtail barley was highly competitive with wheat for added N. N fertiliser placed mid-row in 10-cm-deep bands reduced foxtail barley growth in 2 of 5 yr and increased wheat yield in 3 of 5 yr compared with soil surface broadcast N. Wheat yield sometimes was similar when N was banded at 60 kg ha −1 or broadcast at 120 kg ha −1 , indicating the large advantage of banding N in some situations. Glyphosate at 800 g ha −1 applied preharvest or postharvest gave similar levels of foxtail barley control in 2 of 3 yr. Results indicate that foxtail barley can be adequately managed in wheat production systems utilizing conservation tillage. Key words: Foxtail barley, Hordeum jubatum, glyphosate, integrated weed management, nitrogen placement, zero tillage
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Claims 9
Claim · model-written summary
Fall and spring wide-blade tillage reduced foxtail barley biomass versus zero tillage.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- Wide-blade tillage conducted in fall and springe0
- Interactor
- foxtail barley
.jpg?width=60)
Hordeum jubatume0weed - Outcome
- foxtail barley biomasse0
- Direction
- reducede0
- Comparator
- zero-tille0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Wide-blade tillage conducted in fall and spring, compared to zero-till, reduced foxtail barley biomass”
t0“wheat”
Claim · model-written summary
Fall and spring wide-blade tillage reduced foxtail barley seed production.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Wide-blade tillagee0
- Interactor
- foxtail barleyHordeum jubatume0weed
- Outcome
- seed productione0
- Direction
- reducede0
- Comparator
- zero-tille0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wide-blade tillage conducted in fall and spring, compared to zero-till, reduced foxtail barley biomass and seed production in all yr”
t0“wheat”
Claim · model-written summary
Tillage increased wheat yield in four of five years.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Wide-blade tillagee0
- Outcome
- wheat yielde0
- Direction
- increasede0
- Qualifier
- 4 of 5 yre0
- Comparator
- zero-tille0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wide-blade tillage conducted in fall and spring, compared to zero-till, reduced foxtail barley biomass and seed production in all yr and increased wheat yield in 4 of 5 yr”
Claim · model-written summary
Foxtail barley competed strongly with wheat for added nitrogen.
- Taxon
- wheatTriticum aestivume0
- Interactor
- Foxtail barleyHordeum jubatume0weed
- Outcome
- highly competitivee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foxtail barley was highly competitive with wheat for added N”
Claim · model-written summary
Mid-row banded nitrogen reduced foxtail barley growth in two of five years versus surface broadcast nitrogen.
- Taxon
- wheatTriticum aestivume1
- Treatment
- N fertiliser placed mid-row in 10-cm-deep bandse0
- Interactor
- foxtail barleyHordeum jubatume0weed
- Outcome
- foxtail barley growthe0
- Direction
- reducede0
- Comparator
- soil surface broadcast Ne2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertiliser placed mid-row in 10-cm-deep bands reduced foxtail barley growth in 2 of 5 yr”
e1“in spring wheat”
e2“compared with soil surface broadcast N”
Claim · model-written summary
Mid-row banded nitrogen increased wheat yield in three of five years.
- Taxon
- wheatTriticum aestivume0
- Treatment
- N fertiliser placed mid-row in 10-cm-deep bandse1
- Outcome
- wheat yielde0
- Direction
- increasede0
- Comparator
- soil surface broadcast Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased wheat yield in 3 of 5 yr compared with soil surface broadcast N”
e1“N fertiliser placed mid-row in 10-cm-deep bands”
Claim · model-written summary
Wheat yield was sometimes similar for 60 kg ha−1 banded versus 120 kg ha−1 broadcast nitrogen.
- Taxon
- WheatTriticum aestivume0
- Treatment
- N was banded at 60 kg ha −1e0
- Outcome
- Wheat yielde0
- Direction
- similare0
- Comparator
- broadcast at 120 kg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat yield sometimes was similar when N was banded at 60 kg ha −1 or broadcast at 120 kg ha −1”
Claim · model-written summary
Preharvest and postharvest glyphosate gave similar foxtail barley control in two of three years.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Glyphosate at 800 g ha −1 applied preharveste0
- Interactor
- foxtail barleyHordeum jubatume0weed
- Outcome
- foxtail barley controle0
- Direction
- similare0
- Comparator
- postharveste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate at 800 g ha −1 applied preharvest or postharvest gave similar levels of foxtail barley control in 2 of 3 yr”
t0“wheat”
Claim · model-written summary
Foxtail barley can be adequately managed under conservation tillage in wheat.
- Taxon
- wheatTriticum aestivume0
- Interactor
- foxtail barleyHordeum jubatume0weed
- Outcome
- adequately managede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foxtail barley can be adequately managed in wheat production systems utilizing conservation tillage”
The same questions in other papers
glyphosate · Hordeum jubatum · Triticum aestivum (wheat)Positive and negative results
1 in the opposite direction
- positive
tillage · yield · Triticum aestivum (wheat)Positive and negative results
1,115 papers in the same direction as this paper · 257 in the opposite direction · 41 reporting no difference from an alternative
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3,114 papers in the same direction as this paper · 284 in the opposite direction · 39 reporting no difference from an alternative
- positive
- no effect
- negative
3,434 papers more in this group
See all 3,438 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.