Abstract
Core Ideas Lower‐leaf removal will reduce cured leaf yield but can reduce the portion of lower‐demand stalk positions Nitrogen application after leaf removal is of limited value and is currently discouraged If these programs are to find commercial success, a higher selling price should be offered by leaf purchasers With a current global over‐supply of flue‐cured tobacco ( Nicotiana tabacum L.), tobacco producers in North Carolina have been encouraged to remove the lowermost leaves prior to harvest due to their low value in manufactured products. The objective of this research was to compare lower‐leaf removal programs. Research was conducted in 2016 and 2017 to quantify the agronomic effects of three lower‐leaf removal programs (0, 4, and 8 leaves plant −1 ) and the subsequent delivery of four N application rates (0, 5.6, 11.2, and 16.9 kg N ha −1 above base recommendation). All treatments combinations were applied during the early flowering stage of growth (8–10 wk after transplanting), when plants were approximately 120 cm tall. Programs absent of leaf removal generally produced the highest cured leaf yield. The addition of 16.9 kg N ha −1 increased yield when compared to lower N application rates within the 4‐leaf removal program. Nitrogen application did not affect yield in the 8‐leaf removal program. Cured leaf value was greatest in the 0‐leaf removal program (USD $10,131 ha −1 ) and was reduced in the 4‐ and 8‐leaf programs by $1611 and $2645 ha −1 , respectively. Lower‐stalk positions were nearly eliminated in the 8‐leaf removal program, while the 4‐leaf removal program reduced their presence by more than 50%. Ultimately, if these programs are to be encouraged or required by industry, the removal of four leaves per plant proved to be more practical when paired with additional N, due to moderate yield reduction and lower‐stalk leaf production.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
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 9
Claim · model-written summary
Programs absent of leaf removal generally produced the highest cured leaf yield.
- Taxon
- Nicotiana tabacum L.
Nicotiana tabacume0 - Treatment
- Programs absent of leaf removale1
- Outcome
- cured leaf yielde1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nicotiana tabacum L.”
e1“Programs absent of leaf removal generally produced the highest cured leaf yield”
Claim · model-written summary
Adding 16.9 kg N ha-1 increased yield compared with lower N rates within the 4-leaf removal program.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacume0
- Treatment
- 16.9 kg N ha −1e2
- Outcome
- yielde2
- Direction
- increasede2
- Comparator
- lower N application ratese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nicotiana tabacum L.”
e2“The addition of 16.9 kg N ha −1 increased yield when compared to lower N application rates within the 4‐leaf removal program”
Claim · model-written summary
Nitrogen application did not affect yield in the 8-leaf removal program.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacume0
- Treatment
- Nitrogen applicatione3
- Outcome
- yielde3
- Direction
- did not affecte3
- Qualifier
- 8‐leaf removal programe3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nicotiana tabacum L.”
e3“Nitrogen application did not affect yield in the 8‐leaf removal program”
Claim · model-written summary
Cured leaf value was greatest in the 0-leaf removal program.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacume0
- Treatment
- 0‐leaf removal programe4
- Outcome
- cured leaf valuee4
- Direction
- greateste4
- Value
- USD $10,131 ha −1e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nicotiana tabacum L.”
e4“Cured leaf value was greatest in the 0‐leaf removal program (USD $10,131 ha −1 ) and was reduced in the 4‐ and 8‐leaf programs by $1611 and $2645 ha −1 , respectively”
Claim · model-written summary
Cured leaf value was reduced in the 4-leaf program by $1611 ha-1 relative to the 0-leaf program.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacume0
- Treatment
- 4‐ and 8‐leaf programse4
- Outcome
- cured leaf valuee4
- Direction
- reducede4
- Value
- $1611e4
- Comparator
- 0‐leaf removal programe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nicotiana tabacum L.”
e4“Cured leaf value was greatest in the 0‐leaf removal program (USD $10,131 ha −1 ) and was reduced in the 4‐ and 8‐leaf programs by $1611 and $2645 ha −1 , respectively”
Claim · model-written summary
Cured leaf value was reduced in the 8-leaf program by $2645 ha-1 relative to the 0-leaf program.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacume0
- Treatment
- 4‐ and 8‐leaf programse4
- Outcome
- cured leaf valuee4
- Direction
- reducede4
- Value
- $2645e4
- Comparator
- 0‐leaf removal programe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nicotiana tabacum L.”
e4“Cured leaf value was greatest in the 0‐leaf removal program (USD $10,131 ha −1 ) and was reduced in the 4‐ and 8‐leaf programs by $1611 and $2645 ha −1 , respectively”
Claim · model-written summary
Lower-stalk positions were nearly eliminated in the 8-leaf removal program.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacume0
- Treatment
- 8‐leaf removal programe5
- Outcome
- Lower‐stalk positionse5
- Direction
- nearly eliminatede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nicotiana tabacum L.”
e5“Lower‐stalk positions were nearly eliminated in the 8‐leaf removal program, while the 4‐leaf removal program reduced their presence by more than 50%”
Claim · model-written summary
The 4-leaf removal program reduced the presence of lower-stalk positions by more than 50%.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacume0
- Treatment
- 4‐leaf removal programe5
- Outcome
- presencee5
- Direction
- reducede5
- Value
- more than 50%e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nicotiana tabacum L.”
e5“Lower‐stalk positions were nearly eliminated in the 8‐leaf removal program, while the 4‐leaf removal program reduced their presence by more than 50%”
Claim · model-written summary
Removing four leaves per plant was more practical when paired with additional N, given moderate yield reduction.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacume0
- Treatment
- additional Ne6
- Outcome
- removal of four leaves per plante6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nicotiana tabacum L.”
e6“the removal of four leaves per plant proved to be more practical when paired with additional N, due to moderate yield reduction and lower‐stalk leaf production”
The same questions in other papers
nitrogen · yield · Nicotiana tabacum (tobacco)Results differ
84 papers in the same direction as this paper · 15 in the opposite direction · 3 reporting no difference from an alternative
- positive
- negative
- no effect
99 papers more in this group
See all 103 papers →pruning · yield · Nicotiana tabacum (tobacco)Positive and negative results
19 papers in the same direction as this paper · 7 in the opposite direction
- positive
- no effect
- negative
23 papers more in this group
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.