Abstract
Abstract The sugar beet ( Beta vulgaris L.) industry has adopted an early harvest option that lengthens the processing campaign by 15 to 30 d. Field experiments were conducted near Powell, WY, from 1989 to 1991, to determine whether plant density and N rate should be adjusted for earlier harvests. Main plots were N application rates of 0, 112, 168, 224, 280, and 336 kg N ha −1 ; split plots were target plant densities of 37 100, 61 800, 86 500, and 111 200 plants ha −1 . Harvests were at regular intervals beginning 13 September and ending 25 October. During the harvest season, root yield increased 8.0 Mg ha −1 , sucrose content increased 29 g kg −1 , and recoverable sucrose increased 2.44 Mg ha −1 . The first 112 kg N ha −1 increased root yield 11.8 Mg ha −1 , while the next 56 kg N ha −1 increased root yield 5.2 Mg ha −1 . Sucrose content decreased from 164 to 157 g kg −1 as N rate increased from 0 to 336 kg ha −1 . The first 168 kg N ha −1 increased recoverable sucrose 2.48 Mg ha −1 . Plant density had no effect on root yield. Sucrose content increased 5 g kg −1 as plant density increased from 42 000 to 112 000 plants ha −1 . Recoverable sucrose increased from 7.40 Mg ha −1 at 42 700 plants ha −1 to a maximum of 7.79 Mg ha −1 at 88 600 plants ha −1 . No consistent harvest date ✕ plant density interactions were observed for yield and quality measurements, suggesting that no adjustments in plant density were needed for earlier harvest dates. A harvest date ✕ N rate interaction for recoverable sucrose implies that N rate should be decreased for earlier harvest dates.
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Claims 14
Claim · model-written summary
During the harvest season, root yield increased by 8.0 Mg ha −1.
- Taxon
- Sugar Beet
Beta vulgaris subsp. vulgarist0 - Outcome
- root yielde0
- Direction
- increasede0
- Value
- 8.0 Mg ha −1e0
- Setting
- harvest seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the harvest season, root yield increased 8.0 Mg ha −1 , sucrose content increased 29 g kg −1 , and recoverable sucrose increased 2.44 Mg ha −1 .”
t0“Sugar Beet”
Claim · model-written summary
During the harvest season, sucrose content increased by 29 g kg −1.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- sucrose contente0
- Direction
- increasede0
- Value
- 29 g kg −1e0
- Setting
- harvest seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the harvest season, root yield increased 8.0 Mg ha −1 , sucrose content increased 29 g kg −1 , and recoverable sucrose increased 2.44 Mg ha −1 .”
t0“Sugar Beet”
Claim · model-written summary
During the harvest season, recoverable sucrose increased by 2.44 Mg ha −1.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- recoverable sucrosee0
- Direction
- increasede0
- Value
- 2.44 Mg ha −1e0
- Setting
- harvest seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the harvest season, root yield increased 8.0 Mg ha −1 , sucrose content increased 29 g kg −1 , and recoverable sucrose increased 2.44 Mg ha −1 .”
t0“Sugar Beet”
Claim · model-written summary
first 112 kg N ha −1 increased root yield by 11.8 Mg ha −1.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- first 112 kg N ha −1e0
- Outcome
- root yielde0
- Direction
- increasede0
- Value
- 11.8 Mg ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The first 112 kg N ha −1 increased root yield 11.8 Mg ha −1 , while the next 56 kg N ha −1 increased root yield 5.2 Mg ha −1 .”
t0“Sugar Beet”
Claim · model-written summary
next 56 kg N ha −1 increased root yield by 5.2 Mg ha −1.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- next 56 kg N ha −1e0
- Outcome
- root yielde0
- Direction
- increasede0
- Value
- 5.2 Mg ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The first 112 kg N ha −1 increased root yield 11.8 Mg ha −1 , while the next 56 kg N ha −1 increased root yield 5.2 Mg ha −1 .”
t0“Sugar Beet”
Claim · model-written summary
Sucrose content fell from 164 to 157 g kg −1 with increasing N rate.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- N ratee0
- Outcome
- Sucrose contente0
- Direction
- decreasede0
- Value
- 164 to 157 g kg −1e0
- Qualifier
- 0 to 336 kg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sucrose content decreased from 164 to 157 g kg −1 as N rate increased from 0 to 336 kg ha −1 .”
t0“Sugar Beet”
Claim · model-written summary
The first 168 kg N ha −1 increased recoverable sucrose by 2.48 Mg ha −1.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- first 168 kg N ha −1e0
- Outcome
- recoverable sucrosee0
- Direction
- increasede0
- Value
- 2.48 Mg ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The first 168 kg N ha −1 increased recoverable sucrose 2.48 Mg ha −1 .”
t0“Sugar Beet”
Claim · model-written summary
Plant density had no effect on root yield.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- Plant densitye0
- Outcome
- root yielde0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant density had no effect on root yield.”
t0“Sugar Beet”
Claim · model-written summary
Sucrose content increased 5 g kg −1 over the stated plant density range.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- plant densitye0
- Outcome
- Sucrose contente0
- Direction
- increasede0
- Value
- 5 g kg −1e0
- Qualifier
- 42 000 to 112 000 plants ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sucrose content increased 5 g kg −1 as plant density increased from 42 000 to 112 000 plants ha −1 .”
t0“Sugar Beet”
Claim · model-written summary
Recoverable sucrose reached 7.79 Mg ha −1 at 88 600 plants ha −1, from 7.40 Mg ha −1 at 42 700 plants ha −1.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- 88 600 plants ha −1e0
- Outcome
- Recoverable sucrosee0
- Direction
- increasede0
- Value
- 7.79 Mg ha −1e0
- Qualifier
- 7.40 Mg ha −1 at 42 700 plants ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recoverable sucrose increased from 7.40 Mg ha −1 at 42 700 plants ha −1 to a maximum of 7.79 Mg ha −1 at 88 600 plants ha −1 .”
t0“Sugar Beet”
Claim · model-written summary
No consistent harvest date by plant density interaction was observed for yield and quality.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- harvest date ✕ plant density interactionse0
- Direction
- No consistente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No consistent harvest date ✕ plant density interactions were observed for yield and quality measurements, suggesting that no adjustments in plant density were needed for earlier harvest dates.”
t0“Sugar Beet”
Claim · model-written summary
The authors suggested no plant density adjustment for earlier harvests.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- no adjustments in plant density were needed for earlier harvest datese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No consistent harvest date ✕ plant density interactions were observed for yield and quality measurements, suggesting that no adjustments in plant density were needed for earlier harvest dates.”
t0“Sugar Beet”
Claim · model-written summary
Harvest date interacted with N rate for recoverable sucrose.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- harvest date ✕ N rate interaction for recoverable sucrosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A harvest date ✕ N rate interaction for recoverable sucrose implies that N rate should be decreased for earlier harvest dates.”
t0“Sugar Beet”
Claim · model-written summary
The authors recommend decreasing N rate for earlier harvest dates.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- N rate should be decreased for earlier harvest datese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A harvest date ✕ N rate interaction for recoverable sucrose implies that N rate should be decreased for earlier harvest dates.”
t0“Sugar Beet”
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