Abstract
In a 3-yr experiment, flue-cured tobacco, spaced at 60 cm in rows 107 cm apart, was topped at 12, 15, or 18 leaves or not topped. In a 2-yr experiment, plants were spaced at 38, 48, 58, and 71 cm, in rows 107 cm apart and topped at 14 or 18 leaves. Yield of tobacco increased with increase in topping height or decrease in plant spacing. The untopped tobacco yielded more than tobacco topped to 12 leaves. Lamina weight tended to increase with lower topping height or wider spacing. Increasing height of topping or decreasing plant spacing decreased total alkaloids in leaves and cigarette smoke; untopped tobacco was lower in total alkaloids than any topped tobacco. Level of total N was highest with the 12-leaf topping height in the sample combined from all harvests. Low topping and wide spacing tended to give the lowest reducing sugars for the combined sample. Increasing plant spacing tended to increase petroleum ether extract in the fourth and fifth harvests. Total particulate matter was not affected by height of topping but untopped tobacco had the lowest total particulate matter.
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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 14
Claim · model-written summary
Tobacco yield increased with topping height.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- topping heighte0
- Outcome
- Yield of tobaccoe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield of tobacco increased with increase in topping height”
Claim · model-written summary
Tobacco yield increased as spacing decreased.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- plant spacinge0
- Outcome
- Yield of tobaccoe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield of tobacco increased with increase in topping height or decrease in plant spacing.”
Claim · model-written summary
Untopped tobacco yielded more than tobacco topped at 12 leaves.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- untoppede0
- Outcome
- yieldede0
- Direction
- moree0
- Comparator
- tobacco topped to 12 leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The untopped tobacco yielded more than tobacco topped to 12 leaves.”
Claim · model-written summary
Lamina weight tended to increase with lower topping height.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- lower topping heighte0
- Outcome
- Lamina weighte0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lamina weight tended to increase with lower topping height or wider spacing.”
t0“TOBACCO”
Claim · model-written summary
Lamina weight tended to increase with wider spacing.
- Taxon
- TOBACCONicotiana tabacumt0
- Treatment
- wider spacinge0
- Outcome
- Lamina weighte0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lamina weight tended to increase with lower topping height or wider spacing.”
t0“TOBACCO”
Claim · model-written summary
Higher topping height decreased leaf and smoke total alkaloids.
- Taxon
- TOBACCONicotiana tabacumt0
- Treatment
- Increasing height of toppinge0
- Outcome
- total alkaloids in leaves and cigarette smokee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing height of topping or decreasing plant spacing decreased total alkaloids in leaves and cigarette smoke”
t0“TOBACCO”
Claim · model-written summary
Decreasing spacing decreased total alkaloids in leaves and smoke.
- Taxon
- TOBACCONicotiana tabacumt0
- Treatment
- decreasing plant spacinge0
- Outcome
- total alkaloids in leaves and cigarette smokee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing height of topping or decreasing plant spacing decreased total alkaloids in leaves and cigarette smoke”
t0“TOBACCO”
Claim · model-written summary
Untopped tobacco had lower total alkaloids than topped tobacco.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- untopped tobaccoe0
- Outcome
- total alkaloidse0
- Direction
- lowere0
- Comparator
- any topped tobaccoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“untopped tobacco was lower in total alkaloids than any topped tobacco”
Claim · model-written summary
Total nitrogen was highest with 12-leaf topping.
- Taxon
- TOBACCONicotiana tabacumt0
- Treatment
- 12-leaf topping heighte0
- Outcome
- total Ne0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Level of total N was highest with the 12-leaf topping height in the sample combined from all harvests.”
t0“TOBACCO”
Claim · model-written summary
Low topping tended to give the lowest reducing sugars.
- Taxon
- TOBACCONicotiana tabacumt0
- Treatment
- Low toppinge0
- Outcome
- reducing sugarse0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low topping and wide spacing tended to give the lowest reducing sugars for the combined sample.”
t0“TOBACCO”
Claim · model-written summary
Wide spacing tended to give the lowest reducing sugars.
- Taxon
- TOBACCONicotiana tabacumt0
- Treatment
- wide spacinge0
- Outcome
- reducing sugarse0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low topping and wide spacing tended to give the lowest reducing sugars for the combined sample.”
t0“TOBACCO”
Claim · model-written summary
Increasing spacing tended to increase petroleum ether extract.
- Taxon
- TOBACCONicotiana tabacumt0
- Treatment
- Increasing plant spacinge0
- Outcome
- petroleum ether extracte0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing plant spacing tended to increase petroleum ether extract in the fourth and fifth harvests.”
t0“TOBACCO”
Claim · model-written summary
Topping height did not affect total particulate matter.
- Taxon
- TOBACCONicotiana tabacumt0
- Treatment
- height of toppinge0
- Outcome
- Total particulate mattere0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total particulate matter was not affected by height of topping”
t0“TOBACCO”
Claim · model-written summary
Untopped tobacco had the lowest total particulate matter.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- untopped tobaccoe0
- Outcome
- total particulate mattere0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“untopped tobacco had the lowest total particulate matter”
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See all 27 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.