Abstract
Abstract Determinate soybean [ Glycine max (L.) Merr.] cultivars adapted to the northern U.S. soybean growing region have been developed and released in recent years. The purpose of this research was to compare the response of determinate and indeterminate soybean cultivars to varying cultural practices. The determinate cultivars, ‘Gnome’ and ‘Elf’, and the indeterminate cultivars, ‘Beeson’ and ‘Williams’, were grown at two Illiiois locations in planting dates ranging from early May to early July. The soil was Flanagan silt loam (Acquic Argiudoll) at Urbana and Cisne silt loam (Mollis Albaqualf) at Brownstown. Within each planting date, cultivars were planted in 80, 50, and 20 cm row widths. A separate seeding rate study was conducted with the determinate cultivar Elf, using seeding rates of 350,000, 500,000, and 650,000 seeds/ha in both 76 and 20 cm row widths. Planting date contributed most to variation in seed yield. Seed yield in central Illinois decreased an average of 33% as planting date was delayed from early May to early July. Seed yield of the indeterminate cultivars declined steadily after the early May planting date, whereas, seed yield of the determinate cultivars did not decrease until planting date was delayed past early June. The indeterminate cultivars showed a linear decline in plant height and main stem node number as planting date was delayed, whereas, plant height and main stem node number of the determinate cultivars were greatest in early June plantings. Lowest pod height of the determinate cultivars planted after mid‐June or in drought‐prone soils was sufficiently close to the soil surface (less than 10 cm) to cause concern about excessive harvest losses. Seed yields of both the determinate and indeterminate cultivars increased significantly (9 and 5% at Urbana and Brownstown, respectively) as row widths were narrowed from 80 to 50 cm, whereas, seed yields in 50 and 20 cm row widths did not differ. The determinate cultivar Elf exhibited the ability to perform well over plant densities at harvest ranging from 279,000 to 494,000 plants/ha. A seeding rate of 400,000 to 500,000 seeds/ha for determinate cultivars appears sufficient to maximize seed yield, reduce potential harvest losses due to low basal pod height, and insure adequate and uniform stands in unfavorable seedbeds.
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Claims 12
Claim · model-written summary
Planting date contributed most to variation in soybean seed yield.
- Taxon
- Soybeans
Glycine maxt0 - Treatment
- Planting datee1
- Outcome
- variation in seed yielde1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Determinate and Indeterminate Soybeans”
e1“Planting date contributed most to variation in seed yield”
Claim · model-written summary
Soybean seed yield in central Illinois decreased by an average of 33% as planting was delayed from early May to early July.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- planting date was delayed from early May to early Julye2
- Outcome
- Seed yielde2
- Direction
- decreasede2
- Value
- 33%e2
- Comparator
- early Maye2
- Setting
- central Illinoise2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Determinate and Indeterminate Soybeans”
e2“Seed yield in central Illinois decreased an average of 33% as planting date was delayed from early May to early July”
Claim · model-written summary
Seed yield of indeterminate soybean cultivars declined steadily after the early May planting date.
- Taxon
- SoybeansGlycine maxt0
- Material
- indeterminate cultivarse3
- Outcome
- Seed yielde3
- Direction
- declinede3
- Comparator
- early May planting datee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Determinate and Indeterminate Soybeans”
e3“Seed yield of the indeterminate cultivars declined steadily after the early May planting date”
Claim · model-written summary
Seed yield of determinate soybean cultivars did not decrease until planting was delayed past early June.
- Taxon
- SoybeansGlycine maxt0
- Material
- determinate cultivarse4
- Outcome
- seed yielde4
- Direction
- did not decreasee4
- Qualifier
- planting date was delayed past early Junee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Determinate and Indeterminate Soybeans”
e4“whereas, seed yield of the determinate cultivars did not decrease until planting date was delayed past early June”
Claim · model-written summary
Indeterminate soybean cultivars showed a linear decline in plant height and main stem node number as planting was delayed.
- Taxon
- SoybeansGlycine maxt0
- Material
- indeterminate cultivarse5
- Treatment
- planting date was delayede5
- Outcome
- plant height and main stem node numbere5
- Direction
- linear declinee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Determinate and Indeterminate Soybeans”
e5“The indeterminate cultivars showed a linear decline in plant height and main stem node number as planting date was delayed”
Claim · model-written summary
Plant height and main stem node number of determinate soybean cultivars were greatest in early June plantings.
- Taxon
- SoybeansGlycine maxt0
- Material
- determinate cultivarse6
- Outcome
- plant height and main stem node numbere6
- Qualifier
- greatest in early June plantingse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Determinate and Indeterminate Soybeans”
e6“plant height and main stem node number of the determinate cultivars were greatest in early June plantings”
Claim · model-written summary
Lowest pod height of determinate soybean cultivars was less than 10 cm, close to the soil surface.
- Taxon
- SoybeansGlycine maxt0
- Material
- determinate cultivarse0
- Outcome
- Lowest pod heighte0
- Value
- less than 10 cme1
- Qualifier
- sufficiently close to the soil surfacee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Determinate and Indeterminate Soybeans”
e0“Lowest pod height of the determinate cultivars”
e1“was sufficiently close to the soil surface (less than 10 cm)”
Claim · model-written summary
Seed yields of determinate and indeterminate soybean cultivars increased significantly as row width was narrowed from 80 to 50 cm.
- Taxon
- SoybeansGlycine maxt0
- Material
- determinate and indeterminate cultivarse1
- Treatment
- row widths were narrowed from 80 to 50 cme1
- Outcome
- seed yieldse1
- Direction
- increased significantlye1
- Value
- 9 and 5%e1
- Setting
- Urbana and Brownstowne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Determinate and Indeterminate Soybeans”
e1“Seed yields of both the determinate and indeterminate cultivars increased significantly (9 and 5% at Urbana and Brownstown, respectively) as row widths were narrowed from 80 to 50 cm”
Claim · model-written summary
Seed yields did not differ between 50 and 20 cm row widths.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- seed yieldse1
- Direction
- did not differe1
- Qualifier
- in 50 and 20 cm row widthse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Determinate and Indeterminate Soybeans”
e1“seed yields in 50 and 20 cm row widths did not differ”
Claim · model-written summary
Determinate soybean cultivar Elf performed well over plant densities of 279,000 to 494,000 plants/ha at harvest.
- Taxon
- SoybeansGlycine maxt0
- Material
- Elfe1
- Outcome
- perform well over plant densitiese1
- Value
- 279,000 to 494,000 plants/hae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Determinate and Indeterminate Soybeans”
e1“The determinate cultivar Elf exhibited the ability to perform well over plant densities at harvest ranging from 279,000 to 494,000 plants/ha”
Claim · model-written summary
A seeding rate of 400,000 to 500,000 seeds/ha is sufficient to maximize seed yield of determinate soybean cultivars.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- seeding rate of 400,000 to 500,000 seeds/hae1
- Qualifier
- maximize seed yielde1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Determinate and Indeterminate Soybeans”
e1“A seeding rate of 400,000 to 500,000 seeds/ha for determinate cultivars appears sufficient to maximize seed yield”
Claim · model-written summary
A seeding rate of 400,000 to 500,000 seeds/ha reduces potential harvest losses from low basal pod height and gives uniform stands.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- reduce potential harvest losses due to low basal pod heighte1
- Qualifier
- insure adequate and uniform stands in unfavorable seedbedse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Determinate and Indeterminate Soybeans”
e1“reduce potential harvest losses due to low basal pod height, and insure adequate and uniform stands in unfavorable seedbeds”
The same questions in other papers
sowing time · yield · Glycine max (soybean)Positive and negative results
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See all 207 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.