Abstract
The establishment of an adequate and uniform rice ( Oryza sativa L.) stand is critical to achieve high grain yields. The literature is extensive for older cultivars planted in conventional tillage and/or water‐seeded systems; however, there are no published data for current cultivars grown in stale seedbed systems. Six of the cultivars most commonly grown in the Midsouth rice production area of the USA were drill seeded at densities of 108, 215, 323, 430, and 538 seeds m −2 into a stale seedbed at Crowley, LA, from 2002 to 2004, and in Clarksdale, MS, in 2003 and 2004. Established plant densities responded linearly to seeding rate for all cultivars except Cocodrie, which responded quadratically. Rough rice yields were not affected by seeding rate for Cheniere, but followed a quadratic relationship for the cultivars CL161, Cocodrie, and Priscilla. A location × seeding rate interaction was detected for yield of Wells. Seeding rate did not affect rough rice yields for Wells in Mississippi, while in Louisiana, yields responded quadratically. Francis rough rice yields increased linearly with increased seeding rates. Optimal rough rice grain yields can be achieved in Mississippi and Louisiana with a seeding rate of 323 seeds m −2 for cultivars that are currently grown across the Midsouth rice‐producing area in the USA. Furthermore, depending on the cultivar, when plant densities are uniform and range from 50 to 70 plants m −2 , the resulting rice grain yields may offset the cost of terminating the stand and replanting.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Established plant densities responded linearly to seeding rate for all cultivars except Cocodrie.
- Taxon
- rice
Oryza sativae1 - Material
- all cultivars except Cocodriee2
- Treatment
- seeding ratee2
- Outcome
- Established plant densitiese2
- Direction
- responded linearlye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The establishment of an adequate and uniform rice ( Oryza sativa L.) stand is critical to achieve high grain yields”
e2“Established plant densities responded linearly to seeding rate for all cultivars except Cocodrie, which responded quadratically”
Claim · model-written summary
Established plant density of Cocodrie responded quadratically to seeding rate.
- Taxon
- riceOryza sativae1
- Material
- Cocodriee2
- Treatment
- seeding ratee2
- Outcome
- Established plant densitiese2
- Direction
- responded quadraticallye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The establishment of an adequate and uniform rice ( Oryza sativa L.) stand is critical to achieve high grain yields”
e2“Established plant densities responded linearly to seeding rate for all cultivars except Cocodrie, which responded quadratically”
Claim · model-written summary
Rough rice yield of Cheniere was not affected by seeding rate.
- Taxon
- riceOryza sativae1
- Material
- Chenieree3
- Treatment
- seeding ratee3
- Outcome
- Rough rice yieldse3
- Direction
- no_changeinferrede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The establishment of an adequate and uniform rice ( Oryza sativa L.) stand is critical to achieve high grain yields”
e3“Rough rice yields were not affected by seeding rate for Cheniere, but followed a quadratic relationship for the cultivars CL161, Cocodrie, and Priscilla”
Claim · model-written summary
Rough rice yields of CL161, Cocodrie and Priscilla followed a quadratic relationship with seeding rate.
- Taxon
- riceOryza sativae1
- Material
- CL161, Cocodrie, and Priscillae3
- Treatment
- seeding ratee3
- Outcome
- Rough rice yieldse3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The establishment of an adequate and uniform rice ( Oryza sativa L.) stand is critical to achieve high grain yields”
e3“Rough rice yields were not affected by seeding rate for Cheniere, but followed a quadratic relationship for the cultivars CL161, Cocodrie, and Priscilla”
Claim · model-written summary
A location by seeding rate interaction was detected for yield of Wells.
- Taxon
- riceOryza sativae1
- Material
- Wellse4
- Treatment
- seeding ratee4
- Outcome
- yielde4
- Qualifier
- location × seeding rate interactione4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The establishment of an adequate and uniform rice ( Oryza sativa L.) stand is critical to achieve high grain yields”
e4“A location × seeding rate interaction was detected for yield of Wells”
Claim · model-written summary
Seeding rate did not affect rough rice yield of Wells in Mississippi.
- Taxon
- riceOryza sativae1
- Material
- Wellse5
- Treatment
- Seeding ratee5
- Outcome
- rough rice yieldse5
- Direction
- no_changeinferrede5
- Setting
- Mississippie5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The establishment of an adequate and uniform rice ( Oryza sativa L.) stand is critical to achieve high grain yields”
e5“Seeding rate did not affect rough rice yields for Wells in Mississippi, while in Louisiana, yields responded quadratically”
Claim · model-written summary
Yield of Wells responded quadratically to seeding rate in Louisiana.
- Taxon
- riceOryza sativae1
- Material
- Wellse5
- Treatment
- Seeding ratee5
- Outcome
- yieldse5
- Direction
- responded quadraticallye5
- Setting
- Louisianae5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The establishment of an adequate and uniform rice ( Oryza sativa L.) stand is critical to achieve high grain yields”
e5“Seeding rate did not affect rough rice yields for Wells in Mississippi, while in Louisiana, yields responded quadratically”
Claim · model-written summary
Rough rice yield of Francis increased linearly with increased seeding rates.
- Taxon
- riceOryza sativae1
- Material
- Francise6
- Treatment
- seeding ratese6
- Outcome
- rough rice yieldse6
- Direction
- increased linearlye6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The establishment of an adequate and uniform rice ( Oryza sativa L.) stand is critical to achieve high grain yields”
e6“Francis rough rice yields increased linearly with increased seeding rates”
Claim · model-written summary
A seeding rate of 323 seeds m −2 is recommended for optimal rough rice grain yields in Mississippi and Louisiana.
- Taxon
- riceOryza sativae7
- Outcome
- seeding rate of 323 seeds m −2e7
- Value
- 323 seeds m −2e7
- Setting
- Mississippi and Louisianae7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Optimal rough rice grain yields can be achieved in Mississippi and Louisiana with a seeding rate of 323 seeds m −2”
Claim · model-written summary
Rice grain yields may offset the cost of terminating and replanting the stand when plant densities are uniform at 50 to 70 plants m −2.
- Taxon
- riceOryza sativae1
- Treatment
- 50 to 70 plants m −2e1
- Outcome
- grain yieldse1
- Qualifier
- may offset the cost of terminating the stand and replantinge1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“when plant densities are uniform and range from 50 to 70 plants m −2 , the resulting rice grain yields may offset the cost of terminating the stand and replanting”
The same questions in other papers
density · yield · Oryza sativa (rice)Positive and negative results
329 papers in the same direction as this paper · 58 in the opposite direction · 7 reporting no difference from an alternative
- no effect
- negative
- negative
391 papers more in this group
See all 395 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.