Abstract
Experiments were conducted to evaluate the effect of tillage, rye residue levels, and control strategies on weed suppression and potato yield. Reduced tillage (RT) yields in 1989 were lower than in conventional tillage (CT) due to high hairy galinsoga populations. However, in 1990, potato yields were greater in RT when early emerging weeds were suppressed. Increasing residue levels up to 2300 kg ha −1 had no effect on weeds or yields in either year. In a separate study, preemergence herbicides (linuron plus metolachlor, 1.7 kg ai ha −1 each) applied 10 d after planting (DAP) in reduced tillage controlled weeds for 6 wk, but efficacy decreased after hilling. Metribuzin applied postemergence (0.19 kg ai ha −1 ) 7 d after hilling controlled late germinating weeds. Potato yields were greatest when the preemergence herbicides were applied.
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Claims 7
Claim · model-written summary
Reduced tillage yielded less potato than conventional tillage in 1989 amid high hairy galinsoga populations.
- Taxon
- Potatoes
Solanum tuberosumt0 - Treatment
- Reduced tillage (RT)e0
- Interactor
- hairy galinsogae0weed
- Outcome
- yieldse0
- Direction
- lowere0
- Qualifier
- 1989e0
- Comparator
- conventional tillage (CT)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduced tillage (RT) yields in 1989 were lower than in conventional tillage (CT) due to high hairy galinsoga populations.”
t0“Potatoes”
Claim · model-written summary
With early weeds suppressed, reduced tillage gave greater potato yield in 1990.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- RTe0
- Outcome
- potato yieldse0
- Direction
- greatere0
- Qualifier
- when early emerging weeds were suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in 1990, potato yields were greater in RT when early emerging weeds were suppressed”
Claim · model-written summary
Increasing rye residues to 2300 kg per hectare did not affect weeds.
- Taxon
- PotatoesSolanum tuberosumt0
- Treatment
- Increasing residue levels up to 2300 kg ha −1e0
- Interactor
- weedse0weed
- Outcome
- weedse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing residue levels up to 2300 kg ha −1 had no effect on weeds or yields in either year.”
t0“Potatoes”
Claim · model-written summary
Increasing rye residues to 2300 kg per hectare did not affect potato yields.
- Taxon
- PotatoesSolanum tuberosumt0
- Treatment
- Increasing residue levels up to 2300 kg ha −1e0
- Outcome
- yieldse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing residue levels up to 2300 kg ha −1 had no effect on weeds or yields in either year.”
t0“Potatoes”
Claim · model-written summary
Preemergence linuron plus metolachlor controlled weeds for six weeks, with efficacy falling after hilling.
- Taxon
- PotatoesSolanum tuberosumt0
- Treatment
- linuron plus metolachlor, 1.7 kg ai ha −1 eache0
- Interactor
- weedse0weed
- Outcome
- weedse0
- Direction
- controllede0
- Value
- 6 wke0
- Qualifier
- efficacy decreased after hillinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“preemergence herbicides (linuron plus metolachlor, 1.7 kg ai ha −1 each) applied 10 d after planting (DAP) in reduced tillage controlled weeds for 6 wk, but efficacy decreased after hilling.”
t0“Potatoes”
Claim · model-written summary
Postemergence metribuzin controlled late-germinating weeds.
- Taxon
- PotatoesSolanum tuberosumt0
- Treatment
- Metribuzin applied postemergence (0.19 kg ai ha −1 )e0
- Interactor
- weedse0weed
- Outcome
- late germinating weedse0
- Direction
- controllede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Metribuzin applied postemergence (0.19 kg ai ha −1 ) 7 d after hilling controlled late germinating weeds.”
t0“Potatoes”
Claim · model-written summary
Potato yields were greatest after preemergence herbicides.
- Taxon
- PotatoSolanum tuberosume0
- Treatment
- preemergence herbicidese0
- Outcome
- Potato yieldse0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato yields were greatest when the preemergence herbicides were applied.”
The same questions in other papers
metolachlor · weed · Solanum tuberosum (potato)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- negative
- positive
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1 paper more in this group
See all 5 papers →metribuzin · weed · Solanum tuberosum (potato)Positive and negative results
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- positive
- positive
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See all 22 papers →linuron · weed · Solanum tuberosum (potato)Results agree
4 papers in the same direction as this paper
- positive
- positive
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See all 5 papers →tillage · yield · Solanum tuberosum (potato)Results differ
33 papers in the same direction as this paper · 12 in the opposite direction · 6 reporting no difference from an alternative
- no effect
- no effect
- no effect
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See all 52 papers →herbicide · yield · Solanum tuberosum (potato)Results differ
39 papers in the same direction as this paper · 18 in the opposite direction · 3 reporting no difference from an alternative
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See all 61 papers →herbicide · weed · Solanum tuberosum (potato)Positive and negative results
39 papers in the same direction as this paper · 3 in the opposite direction
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See all 43 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.