Abstract
Abstract The ability of peanut plants to adjust to wide plant-to-plant spacing and the use of more precise mechanical planters have not been thoroughly exploited to reduce seeding rates. The magnitude of plant growth adjustment of two runner peanut cultivars to reduced seeding rate was studied in 1992 and 1993. A precision vacuum planter was used to plant the cultivars GK-7 and Southern Runner (SR) in single rows per bed at 8, 12, and 22 seed/m2. Total plant dry matter weight (TDM), leaf area (LA), and main stem height, nodes, and branches were measured six times during each season. Vegetative growth adjustment to reduced seeding rate was detected as early as 52 d after planting (DAP) in 1992 and 42 DAP in 1993. Plants fully adjusted to reduced seeding rate when they began forming pods at 70 DAP in 1992 and 75 DAP in 1993. By this stage, individual plants in the 8 seed/m2 treatment accumulated 2 to 2.7 times as much total dry matter (TDM) as plants in the 22 seed/m2, and all seeding treatments within each cultivar accumulated equivalent amounts of TDM on a unit ground area basis. The 8 seed/m2 treatment produced significantly greater TDM/m2 and leaf area index (LAI) than the 22 seed/m2 treatment by the end of both seasons (132 DAP in 1992 and 152 DAP in 1993). The partitioning of dry weight to pods and leaves was also greatest for the 8 seed/m2 seeding treatment. By the end of the season, the 8 seed/ m2 seeding treatment produced as much as 30% more pod dry weight (PDW) per m2 than the 22 seed/m2 treatment. Plants in the 8 seed/m2 seeding were significantly shorter but produced more main stem nodes and branches than the 22 seed/m2 seeding. Under the conditions of this study, plants of these runner cultivars showed the capacity to grow larger and compensate fully for reduced seeding rate before any measurable pod production began. Pod production, therefore, was not reduced and in some situations increased by reducing the seeding rate to as low as 8 seed/m2.
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Claims 11
Claim · model-written summary
Vegetative growth adjustment to reduced seeding rate was detected as early as 52 DAP in 1992 and 42 DAP in 1993.
- Taxon
- peanut
Arachis hypogaeae1 - Outcome
- Vegetative growth adjustment to reduced seeding ratee2
- Qualifier
- as early as 52 d after planting (DAP) in 1992 and 42 DAP in 1993e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The magnitude of plant growth adjustment of two runner peanut cultivars to reduced seeding rate was studied in 1992 and 1993”
e2“Vegetative growth adjustment to reduced seeding rate was detected as early as 52 d after planting (DAP) in 1992 and 42 DAP in 1993”
Claim · model-written summary
Plants fully adjusted to reduced seeding rate when they began forming pods at 70 DAP in 1992 and 75 DAP in 1993.
- Taxon
- peanutArachis hypogaeae1
- Outcome
- Plants fully adjusted to reduced seeding ratee3
- Qualifier
- when they began forming pods at 70 DAP in 1992 and 75 DAP in 1993e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The magnitude of plant growth adjustment of two runner peanut cultivars to reduced seeding rate was studied in 1992 and 1993”
e3“Plants fully adjusted to reduced seeding rate when they began forming pods at 70 DAP in 1992 and 75 DAP in 1993”
Claim · model-written summary
Plants at 8 seed/m2 accumulated 2 to 2.7 times as much total dry matter per plant as plants at 22 seed/m2.
- Taxon
- peanutArachis hypogaeae1
- Treatment
- 8 seed/m2e4
- Outcome
- total dry matter (TDM)e4
- Direction
- accumulatede4
- Value
- 2 to 2.7 timese4
- Comparator
- 22 seed/m2e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The magnitude of plant growth adjustment of two runner peanut cultivars to reduced seeding rate was studied in 1992 and 1993”
e4“individual plants in the 8 seed/m2 treatment accumulated 2 to 2.7 times as much total dry matter (TDM) as plants in the 22 seed/m2”
Claim · model-written summary
All seeding treatments within each cultivar accumulated equivalent total dry matter per unit ground area.
- Taxon
- peanutArachis hypogaeae1
- Treatment
- seeding treatmentse5
- Outcome
- TDMe5
- Direction
- no_changeinferrede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The magnitude of plant growth adjustment of two runner peanut cultivars to reduced seeding rate was studied in 1992 and 1993”
e5“all seeding treatments within each cultivar accumulated equivalent amounts of TDM on a unit ground area basis”
Claim · model-written summary
The 8 seed/m2 treatment significantly increased TDM/m2 and leaf area index compared with 22 seed/m2 by the end of both seasons.
- Taxon
- peanutArachis hypogaeae1
- Treatment
- 8 seed/m2 treatmente6
- Outcome
- TDM/m2 and leaf area index (LAI)e6
- Direction
- greatere6
- Qualifier
- by the end of both seasonse6
- Comparator
- 22 seed/m2 treatmente6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The magnitude of plant growth adjustment of two runner peanut cultivars to reduced seeding rate was studied in 1992 and 1993”
e6“The 8 seed/m2 treatment produced significantly greater TDM/m2 and leaf area index (LAI) than the 22 seed/m2 treatment by the end of both seasons (132 DAP in 1992 and 152 DAP in 1993)”
Claim · model-written summary
The 8 seed/m2 seeding treatment gave the greatest dry-weight partitioning to pods and leaves.
- Taxon
- peanutArachis hypogaeae1
- Treatment
- 8 seed/m2 seeding treatmente7
- Outcome
- partitioning of dry weight to pods and leavese7
- Direction
- greateste7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The magnitude of plant growth adjustment of two runner peanut cultivars to reduced seeding rate was studied in 1992 and 1993”
e7“The partitioning of dry weight to pods and leaves was also greatest for the 8 seed/m2 seeding treatment”
Claim · model-written summary
The 8 seed/m2 seeding treatment produced as much as 30% more pod dry weight per m2 than 22 seed/m2.
- Taxon
- peanutArachis hypogaeae1
- Treatment
- 8 seed/m2 seeding treatmente2
- Outcome
- pod dry weight (PDW) per m2e2
- Direction
- moree2
- Value
- 30%e2
- Comparator
- 22 seed/m2 treatmente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The magnitude of plant growth adjustment of two runner peanut cultivars to reduced seeding rate was studied in 1992 and 1993”
e2“By the end of the season, the 8 seed/ m2 seeding treatment produced as much as 30% more pod dry weight (PDW) per m2 than the 22 seed/m2 treatment”
Claim · model-written summary
Plants at 8 seed/m2 were significantly shorter in main stem height than plants at 22 seed/m2.
- Taxon
- peanutArachis hypogaeae1
- Treatment
- 8 seed/m2 seedinge2
- Outcome
- main stem heighte3
- Direction
- shortere2
- Comparator
- 22 seed/m2 seedinge2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The magnitude of plant growth adjustment of two runner peanut cultivars to reduced seeding rate was studied in 1992 and 1993”
e2“Plants in the 8 seed/m2 seeding were significantly shorter but produced more main stem nodes and branches than the 22 seed/m2 seeding”
e3“Total plant dry matter weight (TDM), leaf area (LA), and main stem height, nodes, and branches were measured six times during each season”
Claim · model-written summary
Plants at 8 seed/m2 produced more main stem nodes and branches than plants at 22 seed/m2.
- Taxon
- peanutArachis hypogaeae1
- Treatment
- 8 seed/m2 seedinge2
- Outcome
- main stem nodes and branchese2
- Direction
- moree2
- Comparator
- 22 seed/m2 seedinge2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The magnitude of plant growth adjustment of two runner peanut cultivars to reduced seeding rate was studied in 1992 and 1993”
e2“Plants in the 8 seed/m2 seeding were significantly shorter but produced more main stem nodes and branches than the 22 seed/m2 seeding”
Claim · model-written summary
Reducing the seeding rate to as low as 8 seed/m2 did not reduce pod production and in some situations increased it.
- Taxon
- peanutArachis hypogaeae1
- Treatment
- reducing the seeding rate to as low as 8 seed/m2e2
- Outcome
- Pod productione2
- Direction
- not reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The magnitude of plant growth adjustment of two runner peanut cultivars to reduced seeding rate was studied in 1992 and 1993”
e2“Pod production, therefore, was not reduced and in some situations increased by reducing the seeding rate to as low as 8 seed/m2”
Claim · model-written summary
Plants compensated fully for reduced seeding rate before any measurable pod production began.
- Taxon
- peanutArachis hypogaeae1
- Outcome
- compensate fully for reduced seeding ratee2
- Qualifier
- before any measurable pod production begane2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The magnitude of plant growth adjustment of two runner peanut cultivars to reduced seeding rate was studied in 1992 and 1993”
e2“plants of these runner cultivars showed the capacity to grow larger and compensate fully for reduced seeding rate before any measurable pod production began”
The same questions in other papers
density · yield · Arachis hypogaea (peanut)Positive and negative results
86 papers in the same direction as this paper · 14 in the opposite direction · 1 reporting no difference from an alternative
- negative
- positive
- positive
98 papers more in this group
See all 102 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.