Abstract
Research was conducted to develop a cultural system that would permit a destructive mechanical okra [ Abelmoschus esculentus (L.) Moench] harvest. Okra grown at a highly dense (HD) plant population of 25 × 23 cm and destructively harvested by machine was compared with control plants spaced at 90 × 23 cm and repeatedly and non-destructively harvested by hand. The control N fertilization regime was 45 kg·ha -1 of N preplant, followed by one or two topdressings, each with 22 kg·ha -1 of N. Treatments applied to HD plots were designed to be multiples of the control N fertilization levels. Preplant fertilizer was added such that the sum of residual soil N plus the added fertilizer would total to 45, 90, or 135 kg·ha -1 of N for the standard, intermediate, and highest rates, respectively. Topdressing rates were 22, 44, or 66 kg·ha -1 of N for standard, intermediate, and highest, respectively. Topdressing was timed to follow a mechanical harvest of the HD plots. Since there was only one mechanical harvest in the two 1995 studies, topdress N treatments did not affect yields from mechanical harvest in that year. Nitrogen treatments had few effects on fruit yield per hectare of HD okra, even when stem N concentrations equaled or exceeded those of control plants. The highest N rate tended to delay fruit production. Increasing N rates did not affect the marketable fruit yield obtained by mechanical harvest of HD plants expressed as a percentage of the total cumulative marketable fruit yield from control plants. Physiological factors appear to be limiting the potential for densely planted okra in a destructive mechanical harvest system rather than horticultural factors such as N nutrition.
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Claims 6
Claim · model-written summary
Nitrogen treatments had few effects on fruit yield per hectare of densely planted okra.
- Taxon
- Okra
.jpg?width=60)
Abelmoschus esculentuse0 - Treatment
- Nitrogen treatmentse1
- Outcome
- fruit yield per hectare of HD okrae1
- Qualifier
- few effectse1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Okra grown at a highly dense (HD) plant population”
e1“Nitrogen treatments had few effects on fruit yield per hectare of HD okra, even when stem N concentrations equaled or exceeded those of control plants”
Claim · model-written summary
The highest N rate tended to delay fruit production of densely planted okra.
- Taxon
- OkraAbelmoschus esculentuse0
- Treatment
- highest N ratee2
- Outcome
- fruit productione2
- Direction
- delaye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Okra grown at a highly dense (HD) plant population”
e2“The highest N rate tended to delay fruit production”
Claim · model-written summary
Increasing N rates did not affect the marketable fruit yield of densely planted okra harvested mechanically, expressed as a percentage of control marketable yield.
- Taxon
- OkraAbelmoschus esculentuse0
- Treatment
- Increasing N ratese3
- Outcome
- marketable fruit yield obtained by mechanical harvest of HD plants expressed as a percentage of the total cumulative marketable fruit yielde3
- Direction
- did not affecte3
- Comparator
- control plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Okra grown at a highly dense (HD) plant population”
e3“Increasing N rates did not affect the marketable fruit yield obtained by mechanical harvest of HD plants expressed as a percentage of the total cumulative marketable fruit yield from control plants”
Claim · model-written summary
Topdress N treatments did not affect yields from mechanical harvest in 1995.
- Taxon
- OkraAbelmoschus esculentuse0
- Treatment
- topdress N treatmentse4
- Outcome
- yields from mechanical harveste4
- Direction
- did not affecte4
- Qualifier
- only one mechanical harvest in the two 1995 studiese4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Okra grown at a highly dense (HD) plant population”
e4“Since there was only one mechanical harvest in the two 1995 studies, topdress N treatments did not affect yields from mechanical harvest in that year”
Claim · model-written summary
Nitrogen treatments gave stem N concentrations that equaled or exceeded those of control okra plants.
- Taxon
- OkraAbelmoschus esculentuse0
- Treatment
- Nitrogen treatmentse1
- Outcome
- stem N concentrationse1
- Direction
- equaled or exceedede1
- Comparator
- control plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Okra grown at a highly dense (HD) plant population”
e1“Nitrogen treatments had few effects on fruit yield per hectare of HD okra, even when stem N concentrations equaled or exceeded those of control plants”
Claim · model-written summary
Physiological factors, rather than N nutrition, appear to limit the potential of densely planted okra in a destructive mechanical harvest system.
- Taxon
- OkraAbelmoschus esculentuse0
- Outcome
- potential for densely planted okra in a destructive mechanical harvest systeme5
- Qualifier
- Physiological factorse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Okra grown at a highly dense (HD) plant population”
e5“Physiological factors appear to be limiting the potential for densely planted okra in a destructive mechanical harvest system rather than horticultural factors such as N nutrition”
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