Abstract
A 2-yr study was conducted to determine the influence of early and late soybean [ Glycine max (L.) Merr.] planting dates on the competitiveness of velvetleaf ( Abutilon theophrasti Medic). Velvetleaf was planted at densities of one plant per 61 and 30 cm of row, and competition ranged from 4 weeks to full season. Soybean planting dates were mid-May and late-June. Velvetleaf emerging with soybeans in mid-May were twice as competitive as those emerging with soybeans planted in late-June. A density of one velvetleaf per 30 cm of row competing full season reduced soybean yields 27% for the early and only 14% for the late planting date. The competitive difference was due to the short-day photoperiodic response of velvetleaf. Although the early growth stages of soybeans are more competitive than those of velvetleaf, 10 weeks after emergence velvetleaf competition reduced soybean growth and development. Velvetleaf does not appear to be a potential major problem in Arkansas for soybeans planted in June due to its photoperiodic response and late season competitiveness. However, the weed could present problems for soybeans planted early, especially when an early maturing variety is used.
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Claims 7
Claim · model-written summary
Velvetleaf emerging with mid-May soybeans was twice as competitive as velvetleaf emerging with late-June soybeans
- Taxon
- Soybean
Glycine maxt0 - Treatment
- soybeans in mid-Maye0
- Interactor
- Velvetleaf
Abutilon theophrastie0weed - Outcome
- competitivee0
- Direction
- twice as competitivee0
- Comparator
- soybeans planted in late-Junee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of Soybean (Glycine max)Planting Date on Velvetleaf”
e0“Velvetleaf emerging with soybeans in mid-May were twice as competitive as those emerging with soybeans planted in late-June”
Claim · model-written summary
One velvetleaf per 30 cm of row competing for the full season reduced early-planted soybean yield by 27%
- Taxon
- SoybeanGlycine maxt0
- Treatment
- one velvetleaf per 30 cm of row competing full seasone1
- Interactor
- velvetleafAbutilon theophrastie1weed
- Outcome
- soybean yieldse1
- Direction
- reducede1
- Value
- 27%e1
- Qualifier
- for the earlye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of Soybean (Glycine max)Planting Date on Velvetleaf”
e1“A density of one velvetleaf per 30 cm of row competing full season reduced soybean yields 27% for the early and only 14% for the late planting date”
Claim · model-written summary
One velvetleaf per 30 cm of row competing for the full season reduced late-planted soybean yield by 14%
- Taxon
- SoybeanGlycine maxt0
- Treatment
- one velvetleaf per 30 cm of row competing full seasone1
- Interactor
- velvetleafAbutilon theophrastie1weed
- Outcome
- soybean yieldse1
- Direction
- reducede1
- Value
- 14%e1
- Qualifier
- for the latee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of Soybean (Glycine max)Planting Date on Velvetleaf”
e1“A density of one velvetleaf per 30 cm of row competing full season reduced soybean yields 27% for the early and only 14% for the late planting date”
Claim · model-written summary
Velvetleaf competition for 10 weeks after emergence reduced soybean growth and development
- Taxon
- SoybeanGlycine maxt0
- Treatment
- velvetleaf competitione2
- Interactor
- velvetleafAbutilon theophrastie2weed
- Outcome
- soybean growth and developmente2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of Soybean (Glycine max)Planting Date on Velvetleaf”
e2“Although the early growth stages of soybeans are more competitive than those of velvetleaf, 10 weeks after emergence velvetleaf competition reduced soybean growth and development”
Claim · model-written summary
Early growth stages of soybeans are more competitive than those of velvetleaf
- Taxon
- SoybeanGlycine maxt0
- Interactor
- velvetleafAbutilon theophrastie2weed
- Outcome
- early growth stages of soybeanse2
- Direction
- more competitivee2
- Comparator
- those of velvetleafe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of Soybean (Glycine max)Planting Date on Velvetleaf”
e2“Although the early growth stages of soybeans are more competitive than those of velvetleaf, 10 weeks after emergence velvetleaf competition reduced soybean growth and development”
Claim · model-written summary
Velvetleaf is not expected to be a major problem for June-planted soybeans in Arkansas
- Taxon
- SoybeanGlycine maxt0
- Interactor
- VelvetleafAbutilon theophrastie3weed
- Outcome
- potential major probleme3
- Setting
- Arkansase3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of Soybean (Glycine max)Planting Date on Velvetleaf”
e3“Velvetleaf does not appear to be a potential major problem in Arkansas for soybeans planted in June”
Claim · model-written summary
The weed could present problems for soybeans planted early, especially with an early maturing variety
- Taxon
- SoybeanGlycine maxt0
- Interactor
- weede4weed
- Outcome
- problemse4
- Qualifier
- especially when an early maturing variety is usede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of Soybean (Glycine max)Planting Date on Velvetleaf”
e4“However, the weed could present problems for soybeans planted early, especially when an early maturing variety is used”
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See all 73 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.