Abstract
Two field experiments were conducted between 1990 and 1992 under sprinkler irrigation at the Research and Extension Center, Torrington, WY to determine the influence of mixed densities and durations of kochia and green foxtail interference in sugarbeet. Sugarbeet root yield and top weight generally decreased as densities of green foxtail and kochia increased whether alone or in combination. Reductions in sugarbeet root yield and above ground biomass from mixed densities of kochia and green foxtail were additive at the low and intermediate density but less than additive at the high density of either species. Sugarbeet root yield decreased as the duration of interference after sugarbeet emergence from a mixed density of kochia and green foxtail increased. Since sugarbeet plants were irrigated to avoid water stress and adequate nutrients were applied, it appears that kochia and green foxtail interfered with sugarbeet primarily for light, based on light and height measurements. Season-long as well as duration of interference did not show any significant effect on sucrose content. Based on regression analysis the lowest densities of kochia and green foxtail required to reduce root yield were approximately 0.3 and 0.06 plants/m of row, respectively. The minimum duration of time that 0.5 kochia and 3.0 green foxtail plants/m of row can interfere with sugarbeets before root yield is economically reduced was approximately 3.5 wk after sugarbeet emergence.
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Claims 10
Claim · model-written summary
Sugarbeet root yield and top weight decreased as green foxtail density increased.
- Taxon
- Sugarbeets
Beta vulgaris subsp. vulgarist0 - Interactor
- green foxtaile0weed
- Outcome
- Sugarbeet root yield and top weighte0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugarbeet root yield and top weight generally decreased as densities of green foxtail and kochia increased whether alone or in combination”
t0“Sugarbeets (Beta vulgaris)”
Claim · model-written summary
Sugarbeet root yield and top weight decreased as kochia density increased.
- Taxon
- SugarbeetsBeta vulgaris subsp. vulgarist0
- Outcome
- Sugarbeet root yield and top weighte0
- Direction
- decreasede0
BassiaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugarbeet root yield and top weight generally decreased as densities of green foxtail and kochia increased whether alone or in combination”
t0“Sugarbeets (Beta vulgaris)”
Claim · model-written summary
Mixed weed densities caused additive root yield and biomass reductions at low and intermediate densities.
- Taxon
- sugarbeetBeta vulgaris subsp. vulgarist0
- Second interactor
- green foxtaile0weed
- Outcome
- Reductions in sugarbeet root yield and above ground biomasse0
- Direction
- additivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reductions in sugarbeet root yield and above ground biomass from mixed densities of kochia and green foxtail were additive at the low and intermediate density”
t0“Sugarbeets (Beta vulgaris)”
Claim · model-written summary
Mixed weed effects on root yield and biomass were less than additive at high density.
- Taxon
- SugarbeetsBeta vulgaris subsp. vulgarist0
- Outcome
- less than additivee0
- Direction
- less than additivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“less than additive at the high density of either species”
t0“Sugarbeets (Beta vulgaris)”
Claim · model-written summary
Sugarbeet root yield fell as the duration of mixed weed interference increased.
- Taxon
- sugarbeetBeta vulgaris subsp. vulgarist0
- Second interactor
- green foxtaile0weed
- Outcome
- Sugarbeet root yielde0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugarbeet root yield decreased as the duration of interference after sugarbeet emergence from a mixed density of kochia and green foxtail increased”
t0“Sugarbeets (Beta vulgaris)”
Claim · model-written summary
The authors infer that kochia and green foxtail competed primarily for light.
- Taxon
- sugarbeetBeta vulgaris subsp. vulgarist0
- Second interactor
- green foxtaile0weed
- Outcome
- interfered with sugarbeete0
- Qualifier
- primarily for lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“kochia and green foxtail interfered with sugarbeet primarily for light”
t0“Sugarbeets (Beta vulgaris)”
Claim · model-written summary
Interference had no significant effect on sucrose content.
- Taxon
- SugarbeetsBeta vulgaris subsp. vulgarist0
- Treatment
- Season-long as well as duration of interferencee0
- Outcome
- sucrose contente0
- Direction
- did not show any significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Season-long as well as duration of interference did not show any significant effect on sucrose content”
t0“Sugarbeets (Beta vulgaris)”
Claim · model-written summary
About 0.3 kochia plants/m of row was the lowest density predicted to reduce root yield.
- Taxon
- SugarbeetsBeta vulgaris subsp. vulgarist0
- Outcome
- root yielde0
- Direction
- reducee0
- Value
- 0.3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lowest densities of kochia and green foxtail required to reduce root yield were approximately 0.3 and 0.06 plants/m of row, respectively”
t0“Sugarbeets (Beta vulgaris)”
Claim · model-written summary
About 0.06 green foxtail plants/m of row was the lowest density predicted to reduce root yield.
- Taxon
- SugarbeetsBeta vulgaris subsp. vulgarist0
- Interactor
- green foxtaile0weed
- Outcome
- root yielde0
- Direction
- reducee0
- Value
- 0.06 plants/m of rowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lowest densities of kochia and green foxtail required to reduce root yield were approximately 0.3 and 0.06 plants/m of row, respectively”
t0“Sugarbeets (Beta vulgaris)”
Claim · model-written summary
The minimum tolerated interference duration was about 3.5 weeks after emergence.
- Taxon
- sugarbeetsBeta vulgaris subsp. vulgarise0
- Second interactor
- green foxtaile0weed
- Outcome
- minimum duration of timee0
- Value
- 3.5 wke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“minimum duration of time that 0.5 kochia and 3.0 green foxtail plants/m of row can interfere with sugarbeets before root yield is economically reduced was approximately 3.5 wk after sugarbeet emergence”
The same questions in other papers
climate site · quality: sugar starch · Beta vulgaris (beet)Positive and negative results
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- positive
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See all 7 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.