Abstract
Soybean [ Glycine max (L.) Merr.] along the upper Gulf Coast region of Texas may be planted from early March through the middle of May. However, soybean yields may vary considerably depending on planting date and cultivar. Field studies were conducted from 2001 through 2003 in Wharton Co. to determine the effect of planting date, soybean cultivar, and seeding rate on yield and pod set. Soybean was planted three times each year at approximately two‐ to three‐week intervals beginning around 10 March. Three cultivars were compared at seeding rates of 145,000 and 220,000 seed/acre. Soybean plant populations varied from year‐to‐year but generally populations increased with later planting dates. Soybean pod height set varied with the cultivar but was usually taller with the later planting date and higher seeding rate. Below average rainfall was observed during the 2001 growing season while near average rainfall was received during the April to June 2002 growing season. Extremely dry conditions were prevalent during March through June of 2003 with above average rainfall in July of that year. In a near normal rainfall growing season (2002), the later planting date resulted in the highest yield while under drought‐stressed conditions, planting date was not an important factor. Overall, soybean planted late‐March to mid‐April produced higher yields than those planted mid‐March. Generally, the higher seeding rate did not improve net returns.
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Claims 7
Claim · model-written summary
Soybean plant populations generally increased with later planting dates.
- Taxon
- Soybean
Glycine maxe0 - Treatment
- later planting datese1
- Outcome
- plant populationse1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean [ Glycine max (L.) Merr.]”
e1“Soybean plant populations varied from year‐to‐year but generally populations increased with later planting dates”
Claim · model-written summary
Soybean pod height set was usually taller with the later planting date.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- later planting datee1
- Outcome
- pod height sete1
- Direction
- tallere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean [ Glycine max (L.) Merr.]”
e1“Soybean pod height set varied with the cultivar but was usually taller with the later planting date and higher seeding rate”
Claim · model-written summary
Soybean pod height set was usually taller with the higher seeding rate.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- higher seeding ratee1
- Outcome
- pod height sete1
- Direction
- tallere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean [ Glycine max (L.) Merr.]”
e1“Soybean pod height set varied with the cultivar but was usually taller with the later planting date and higher seeding rate”
Claim · model-written summary
In a near-normal rainfall season in 2002, the later planting date gave the highest soybean yield.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- later planting datee1
- Outcome
- yielde1
- Direction
- higheste1
- Setting
- near normal rainfall growing season (2002)e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean [ Glycine max (L.) Merr.]”
e1“In a near normal rainfall growing season (2002), the later planting date resulted in the highest yield while under drought‐stressed conditions, planting date was not an important factor”
Claim · model-written summary
Under drought-stressed conditions, planting date was not an important factor for soybean yield.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- planting datee1
- Outcome
- yielde1
- Direction
- not an important factore1
- Setting
- drought‐stressed conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean [ Glycine max (L.) Merr.]”
e1“In a near normal rainfall growing season (2002), the later planting date resulted in the highest yield while under drought‐stressed conditions, planting date was not an important factor”
Claim · model-written summary
Soybean planted late-March to mid-April yielded higher than soybean planted mid-March.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- late‐March to mid‐Aprile1
- Outcome
- yieldse1
- Direction
- highere1
- Comparator
- mid‐Marche1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean [ Glycine max (L.) Merr.]”
e1“Overall, soybean planted late‐March to mid‐April produced higher yields than those planted mid‐March”
Claim · model-written summary
The higher seeding rate did not improve soybean net returns.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- higher seeding ratee1
- Outcome
- net returnse1
- Direction
- did not improvee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean [ Glycine max (L.) Merr.]”
e1“Generally, the higher seeding rate did not improve net returns”
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See all 305 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.