Abstract
Summary Mechanical weed control of perennial weeds in organic crop production over long post‐harvest periods is incompatible with the establishment of cover crops for improving soil quality and preventing nutrient leaching. We suggest a new concept that comprises uprooting and immediate removal of vegetative propagules located within the plough layer to allow for quick re‐establishment of a plant cover. A field experiment comparing the effects of conventional practices (stubble cultivation) with different combinations of rotary cultivation (One, Two or four passes) and cover crops (none vs. rye‐vetch‐mustard mixture) on Elytrigia repens rhizome removal, shoot growth and suppression of a subsequent barley crop was examined in two growing seasons. Four passes with a modified rotary cultivator, where each pass was followed by rhizome removal, reduced E. repens shoot growth in barley by 84% and 97%. In general, the cover crop developed poorly and did not affect barley or E. repens . Barley yield was only affected by treatments in the first season, where yield was negatively correlated with E. repens shoot biomass. The concept has potential for the control of severe E. repens infestations, but future research aimed at identifying more effective smother crops and less intensive methods of rhizome removal is needed.
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Claims 8
Claim · model-written summary
Four rotary passes with rhizome removal reduced E. repens shoot growth in barley by 84% in one season.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- Four passes with a modified rotary cultivator, where each pass was followed by rhizome removale0
- Interactor
- E. repens
Elymus repense0weed - Outcome
- E. repens shoot growthe0
- Direction
- reducede0
- Value
- 84%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Four passes with a modified rotary cultivator, where each pass was followed by rhizome removal, reduced E. repens shoot growth in barley by 84% and 97%”
Claim · model-written summary
Four rotary passes with rhizome removal reduced E. repens shoot growth in barley by 97% in the other season.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- Four passes with a modified rotary cultivator, where each pass was followed by rhizome removale0
- Interactor
- E. repensElymus repense0weed
- Outcome
- E. repens shoot growthe0
- Direction
- reducede0
- Value
- 97%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Four passes with a modified rotary cultivator, where each pass was followed by rhizome removal, reduced E. repens shoot growth in barley by 84% and 97%”
Claim · model-written summary
The cover crop developed poorly.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- cover crop developed poorlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cover crop developed poorly”
t0“barley”
Claim · model-written summary
The cover crop did not affect barley.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- cover crope0
- Outcome
- barleye0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cover crop developed poorly and did not affect barley or E. repens”
Claim · model-written summary
The cover crop did not affect E. repens.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- cover crope0
- Interactor
- E. repensElymus repense0weed
- Outcome
- E. repense0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cover crop developed poorly and did not affect barley or E. repens”
t0“barley”
Claim · model-written summary
Barley yield was affected by treatments only in the first season.
- Taxon
- BarleyHordeum vulgaree0
- Treatment
- treatmentse0
- Outcome
- Barley yielde0
- Qualifier
- first seasone0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Barley yield was only affected by treatments in the first season”
Claim · model-written summary
Barley yield was negatively correlated with E. repens shoot biomass.
- Taxon
- barleyHordeum vulgaret0
- Interactor
- E. repensElymus repense0weed
- Outcome
- yielde0
- Direction
- negatively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield was negatively correlated with E. repens shoot biomass”
t0“barley”
Claim · model-written summary
The authors judged the approach promising for severe E. repens infestations.
- Taxon
- barleyHordeum vulgaret0
- Interactor
- E. repensElymus repense0weed
- Outcome
- control of severe E. repens infestationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concept has potential for the control of severe E. repens infestations”
t0“barley”
The same questions in other papers
cover crop · organism · Hordeum vulgare (barley)Positive and negative results
1 in the opposite direction
- positive
cover crop · Elymus repens · Hordeum vulgare (barley)Positive and negative results
1 in the opposite direction
- positive
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.