Abstract
Row cover and plant population density effects were studied at the Agriculture Canada Research Station, Agassiz, BC in 1988 and 1989. Bell pepper plants (Ace Hybrid) were transplanted into twin rows (0.45 m apart) on raised beds (1.8-m centers) at five population densities of 1.39, 1.85, 2.78, 5.56 and 11.1 plant m −2 . For 7 wk in 1988 or 8 wk in 1989, subplots were either covered or not covered with slit clear polyethylene tunnels. A nonlinear regression model was used to define yield-population density responses. Row covers enhanced early and overall yields in 1988 and overall yield in 1989. Vegetative and reproductive yields (kg plant −1 ) declined with increasing plant population density. Yields were directly related to population density when measured on a land-area basis. Maximum fruit yield (7.9 kg m −2 ) was obtained at the highest population density. Treatment influences on fruit size were small and did not affect horticultural quality. An economic analysis showed that net returns were greatest with plants grown under row covers at the highest population density.Key words: Capsicum annuum L., field bell peppers, population density, row covers
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Claims 6
Claim · model-written summary
Row covers enhanced early and overall yield in 1988 and overall yield in 1989.
- Taxon
- Bell peppere1
- Material
- Ace Hybride1
- Treatment
- Row coverse0
- Outcome
- early and overall yieldse0
- Direction
- enhancede0
Not reportedComparator
Verbatim
e0“Row covers enhanced early and overall yields in 1988 and overall yield in 1989”
e1“Bell pepper plants (Ace Hybrid)”
Claim · model-written summary
Per-plant vegetative and reproductive yields declined as plant density increased.
Verbatim
e0“Vegetative and reproductive yields (kg plant −1 ) declined with increasing plant population density”
e1“Bell pepper plants (Ace Hybrid)”
Claim · model-written summary
Yield per land area increased with plant density.
- Taxon
- Bell peppere1
- Material
- Ace Hybride1
- Treatment
- population densitye0
- Outcome
- Yieldse0
- Qualifier
- land-area basise0
Not reportedDirection
Verbatim
e0“Yields were directly related to population density when measured on a land-area basis”
e1“Bell pepper plants (Ace Hybrid)”
Claim · model-written summary
Maximum fruit yield was 7.9 kg m −2 at the highest density.
Verbatim
e0“Maximum fruit yield (7.9 kg m −2 ) was obtained at the highest population density”
e1“Bell pepper plants (Ace Hybrid)”
Claim · model-written summary
Treatment effects on fruit size were small and did not affect horticultural quality.
Verbatim
e0“Treatment influences on fruit size were small and did not affect horticultural quality”
e1“Bell pepper plants (Ace Hybrid)”
Claim · model-written summary
Net returns were greatest under row covers at highest density.
- Taxon
- Bell peppere1
- Treatment
- row coverse0
- Outcome
- net returnse0
- Direction
- greateste0
- Qualifier
- highest population densitye0
Not reportedComparator
Verbatim
e0“net returns were greatest with plants grown under row covers at the highest population density”
e1“Bell pepper plants (Ace Hybrid)”
The same questions in other papers
trap barrier · yield · Capsicum annuum (sweet pepper)Positive and negative results
10 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
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See all 13 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.