Abstract
Effects of root-shoot interference, soil water regimes, and soil nitrogen were evaluated to determine aggressivity for pea relative to mayweed chamomile in the greenhouse using replacement series experiments. Interference between pea and mayweed chamomile occurred mainly below ground, and soil water was more important than soil nitrogen in controlling the outcome of interference. Pea was a stronger competitor than mayweed chamomile under all conditions investigated. Leaf area, root weight, and shoot weight of mayweed chamomile were reduced 55 to 87% by full interference and 27 to 60% by root only interference from pea. Full interference from mayweed chamomile for 53 days after planting released the remaining pea from intraspecific interference and it grew 80% larger and produced 100% more pod weight compared to a pea in monoculture. Low soil water potential (–175 kPa) compared to high water potential (–33 kPa) reduced the height, leaf area, and shoot weight of pea in 1:1 mixtures, but had no effect on mayweed chamomile. Decreasing soil water increased the aggressivity of mayweed chamomile relative to pea. Nitrogen added at 20 mg wk -1 compared to no added nitrogen had no effect on peas, but more than doubled the size of mayweed chamomile in monoculture and in mixtures with pea. Added nitrogen did not increase the aggressivity of mayweed chamomile relative to pea.
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Claims 13
Claim · model-written summary
Pea was a stronger competitor than mayweed chamomile under all conditions investigated.
- Taxon
- Pea
Lathyrus oleraceuse1 - Interactor
- mayweed chamomilee1weed
- Outcome
- competitore1
- Direction
- strongere1
- Comparator
- mayweed chamomilee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Pea was a stronger competitor than mayweed chamomile under all conditions investigated”
Claim · model-written summary
Interference between pea and mayweed chamomile occurred mainly below ground.
- Taxon
- peaLathyrus oleraceuse1
- Interactor
- mayweed chamomilee1weed
- Outcome
- Interference between pea and mayweed chamomilee1
- Qualifier
- occurred mainly below grounde1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Interference between pea and mayweed chamomile occurred mainly below ground, and soil water was more important than soil nitrogen in controlling the outcome of interference”
Claim · model-written summary
Soil water was more important than soil nitrogen in controlling the outcome of pea and mayweed chamomile interference.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- soil watere1
- Outcome
- outcome of interferencee1
- Direction
- more importante1
- Comparator
- soil nitrogene1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Interference between pea and mayweed chamomile occurred mainly below ground, and soil water was more important than soil nitrogen in controlling the outcome of interference”
Claim · model-written summary
Full interference by pea reduced leaf area, root weight and shoot weight of mayweed chamomile by 55 to 87%.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- full interferencee1
- Interactor
- mayweed chamomilee1weed
- Outcome
- Leaf area, root weight, and shoot weight of mayweed chamomilee1
- Direction
- reducede1
- Value
- 55 to 87%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Leaf area, root weight, and shoot weight of mayweed chamomile were reduced 55 to 87% by full interference and 27 to 60% by root only interference from pea”
Claim · model-written summary
Root only interference by pea reduced leaf area, root weight and shoot weight of mayweed chamomile by 27 to 60%.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- root only interferencee1
- Interactor
- mayweed chamomilee1weed
- Outcome
- Leaf area, root weight, and shoot weight of mayweed chamomilee1
- Direction
- reducede1
- Value
- 27 to 60%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Leaf area, root weight, and shoot weight of mayweed chamomile were reduced 55 to 87% by full interference and 27 to 60% by root only interference from pea”
Claim · model-written summary
Full interference from mayweed chamomile for 53 days released pea from intraspecific interference and made it grow 80% larger.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- Full interference from mayweed chamomile for 53 days after plantinge1
- Interactor
- mayweed chamomilee1weed
- Outcome
- grewe1
- Direction
- largere1
- Value
- 80%e1
- Comparator
- a pea in monoculturee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Full interference from mayweed chamomile for 53 days after planting released the remaining pea from intraspecific interference and it grew 80% larger and produced 100% more pod weight compared to a pea in monoculture”
Claim · model-written summary
Full interference from mayweed chamomile for 53 days made pea produce 100% more pod weight than a pea in monoculture.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- Full interference from mayweed chamomile for 53 days after plantinge1
- Interactor
- mayweed chamomilee1weed
- Outcome
- pod weighte1
- Direction
- moree1
- Value
- 100%e1
- Comparator
- a pea in monoculturee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Full interference from mayweed chamomile for 53 days after planting released the remaining pea from intraspecific interference and it grew 80% larger and produced 100% more pod weight compared to a pea in monoculture”
Claim · model-written summary
Low soil water potential reduced height, leaf area and shoot weight of pea in 1:1 mixtures.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- Low soil water potential (–175 kPa)e1
- Outcome
- height, leaf area, and shoot weight of peae1
- Direction
- reducede1
- Qualifier
- 1:1 mixturese1
- Comparator
- high water potential (–33 kPa)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Low soil water potential (–175 kPa) compared to high water potential (–33 kPa) reduced the height, leaf area, and shoot weight of pea in 1:1 mixtures, but had no effect on mayweed chamomile”
Claim · model-written summary
Low soil water potential had no effect on mayweed chamomile.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- Low soil water potential (–175 kPa)e1
- Interactor
- mayweed chamomilee1weed
- Outcome
- effect on mayweed chamomilee1
- Direction
- no effecte1
- Comparator
- high water potential (–33 kPa)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Low soil water potential (–175 kPa) compared to high water potential (–33 kPa) reduced the height, leaf area, and shoot weight of pea in 1:1 mixtures, but had no effect on mayweed chamomile”
Claim · model-written summary
Decreasing soil water increased the aggressivity of mayweed chamomile relative to pea.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- Decreasing soil watere1
- Interactor
- mayweed chamomilee1weed
- Outcome
- aggressivity of mayweed chamomilee1
- Direction
- increasede1
- Comparator
- peae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Decreasing soil water increased the aggressivity of mayweed chamomile relative to pea”
Claim · model-written summary
Nitrogen added at 20 mg wk -1 had no effect on peas compared with no added nitrogen.
- Taxon
- peasLathyrus oleraceuse1
- Treatment
- Nitrogen added at 20 mg wk -1e1
- Outcome
- effect on pease1
- Direction
- no effecte1
- Comparator
- no added nitrogene1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nitrogen added at 20 mg wk -1 compared to no added nitrogen had no effect on peas, but more than doubled the size of mayweed chamomile in monoculture and in mixtures with pea”
Claim · model-written summary
Nitrogen added at 20 mg wk -1 more than doubled the size of mayweed chamomile compared with no added nitrogen.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- Nitrogen added at 20 mg wk -1e1
- Interactor
- mayweed chamomilee1weed
- Outcome
- size of mayweed chamomilee1
- Direction
- more than doublede1
- Qualifier
- in monoculture and in mixtures with peae1
- Comparator
- no added nitrogene1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nitrogen added at 20 mg wk -1 compared to no added nitrogen had no effect on peas, but more than doubled the size of mayweed chamomile in monoculture and in mixtures with pea”
Claim · model-written summary
Added nitrogen did not increase the aggressivity of mayweed chamomile relative to pea.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- Added nitrogene1
- Outcome
- aggressivity of mayweed chamomilee1
- Direction
- did not increasee1
- Comparator
- peae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Added nitrogen did not increase the aggressivity of mayweed chamomile relative to pea”
The same questions in other papers
soil water · growth · Lathyrus oleraceus (pea)Positive and negative results
9 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- no effect
7 papers more in this group
See all 11 papers →nitrogen · growth · Lathyrus oleraceus (pea)Positive and negative results
15 papers in the same direction as this paper · 19 in the opposite direction
- positive
- positive
- positive
31 papers more in this group
See all 35 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.