Abstract
Abstract Dryland soybean [ Glycine max (L.) Merr.] production on clay soils in the Mississippi River alluvial flood plain (Delta) is economically marginal, and production inputs must be minimized to achieve economic feasibility. One scheme for reduction of inputs is stale seedbed planting. Three chemical weed control options (none, preemergence only, and post‐emergence only) were compared in both stale and tilled seedbeds on a Sharkey clay (very‐fine, montmorillonitic, thermic Vertic Haplaquept) in 1981 and 1982. Four soybean cultivars representing Maturity Groups V, VI, and VII were used. Yields from the two seedbed treatments with preemergence weed control were equal, but seed yield from the tilled seedbed treatment with no herbicide averaged 225 kg ha −1 greater than the stale seedbed treatment with comparable weed control. Percent weed cover was lowest both years in the tilled seedbed with postemergence weed control. Weed species present in the greatest abundance were prickly sida ( Sida spinosa L.), pitted morningglory ( Ipomoea lacunosa L.), and slender aster ( Aster exilis Ell.). An unfilled seedbed is a viable choice with effective weed management to enable producers to minimize tillage inputs and still maintain yield on clay soils.
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Claims 5
Claim · model-written summary
Yields from the stale and tilled seedbeds were equal when preemergence weed control was used.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- preemergence weed controle1
- Outcome
- Yieldse1
- Direction
- equale1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Yields from the two seedbed treatments with preemergence weed control were equal”
t0“Planting System and Weed Control Effects on Soybean Grown on Clay Soil”
Claim · model-written summary
Tilled seedbed with no herbicide gave 225 kg/ha more seed yield than the stale seedbed with comparable weed control.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- tilled seedbed treatment with no herbicidee2
- Outcome
- seed yielde2
- Direction
- greatere2
- Value
- 225 kg ha −1e2
- Comparator
- stale seedbed treatmente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“seed yield from the tilled seedbed treatment with no herbicide averaged 225 kg ha −1 greater than the stale seedbed treatment with comparable weed control”
t0“Planting System and Weed Control Effects on Soybean Grown on Clay Soil”
Claim · model-written summary
Percent weed cover was lowest in the tilled seedbed with postemergence weed control.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- tilled seedbed with postemergence weed controle3
- Outcome
- Percent weed covere3
- Direction
- loweste3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Percent weed cover was lowest both years in the tilled seedbed with postemergence weed control”
t0“Planting System and Weed Control Effects on Soybean Grown on Clay Soil”
Claim · model-written summary
The most abundant weeds in soybean were prickly sida and pitted morningglory, with slender aster also present.
- Taxon
- SoybeanGlycine maxt0
- Interactor
- prickly sidae4weed
- Second interactor
- pitted morningglorye4weed
- Outcome
- Weed species present in the greatest abundancee4
- Qualifier
- slender astere4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Weed species present in the greatest abundance were prickly sida ( Sida spinosa L.), pitted morningglory ( Ipomoea lacunosa L.), and slender aster ( Aster exilis Ell.)”
t0“Planting System and Weed Control Effects on Soybean Grown on Clay Soil”
Claim · model-written summary
An unfilled seedbed with effective weed management is a viable choice that maintains soybean yield on clay soils.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- maintain yielde5
- Qualifier
- with effective weed managemente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“An unfilled seedbed is a viable choice with effective weed management to enable producers to minimize tillage inputs and still maintain yield on clay soils”
t0“Planting System and Weed Control Effects on Soybean Grown on Clay Soil”
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