Abstract
Soybean [ Glycine max (L.) Merr.] in a corn ( Zea mays L.)‐soybean rotation increases the soil erosion potential compared to continuous corn in regions with rolling terrain. Establishment of cover crops during the soybean vegetative stage, followed by no‐till corn in the cover crop, should reduce soil erosion. In the upper Midwest under rainfed conditions, there is limited opportunity to establish cover crops at initial soybean leaf drop or after harvest, hence the need for earlier underseeding. The objective of this study was to use the plant growth regulator ethephon (2‐chloroethylphosphonic acid) on several soybean cultivars for enhancing light transmission through the canopy to aid establishment of cover crops, and evaluate its effect on soybean growth and yield. Ethephon applied at the V5 to R″ position=“float”> soybean growth stage enhanced cover crop establishment. Light measurements under the canopy indicated greater light transmission when ethephon was used. ‘SF‐250’ soybean without application of ethephon was superior to other cultivars for underseeding cover crops. Ethephon at times delayed soybean maturity and reduced soybean height and yield.
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Claims 5
Claim · model-written summary
Ethephon applied at V5 to R stage enhanced cover crop establishment in soybean
- Taxon
- Soybean
Glycine maxt0 - Treatment
- Ethephone1
- Outcome
- cover crop establishmente1
- Direction
- enhancede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Ethephon applied at the V5 to R″ position=“float”> soybean growth stage enhanced cover crop establishment.”
t0“Ethephon Use on Soybean Cultivars”
Claim · model-written summary
Ethephon gave greater light transmission through the soybean canopy
- Taxon
- SoybeanGlycine maxt0
- Treatment
- ethephone2
- Outcome
- light transmissione2
- Direction
- greatere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Light measurements under the canopy indicated greater light transmission when ethephon was used”
t0“Ethephon Use on Soybean Cultivars”
Claim · model-written summary
Soybean cultivar SF‐250 without ethephon was superior to other cultivars for underseeding cover crops
- Taxon
- SoybeanGlycine maxt0
- Material
- SF‐250e3
- Outcome
- underseeding cover cropse3
- Direction
- superiore3
- Comparator
- other cultivarse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“‘SF‐250’ soybean without application of ethephon was superior to other cultivars for underseeding cover crops”
t0“Ethephon Use on Soybean Cultivars”
Claim · model-written summary
Ethephon at times delayed soybean maturity
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Ethephone4
- Outcome
- soybean maturitye4
- Direction
- delayede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Ethephon at times delayed soybean maturity and reduced soybean height and yield”
t0“Ethephon Use on Soybean Cultivars”
Claim · model-written summary
Ethephon reduced soybean height and yield
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Ethephone4
- Outcome
- soybean height and yielde4
- Direction
- reducede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Ethephon at times delayed soybean maturity and reduced soybean height and yield”
t0“Ethephon Use on Soybean Cultivars”
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1 paper in the same direction as this paper · 1 in the opposite direction
- positive
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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.