Abstract
The influence of fertilizers on cigar-filler tobacco quality, as judged by price per pound, was investigated, using three crops of a major-element fertilizer (N-P2O5-K2O) experiment at Aibonito on a Juncos clay and a source-of-nitrogen experiment at Caguas clay. The results obtained were as follows: 1. The use of 50 pounds per acre of nitrogen increased the quality of the tobacco significantly when compared to the no-nitrogen treatment. 2. Rates up to 150 pounds per acre of nitrogen did not increase significantly either yield or quality of tobacco per acre over the 50-pound-per-acre nitrogen treatment. However, the quality of the tobacco was not reduced by the high nitrogen applications. 3. Phosphates and potash failed to increase the quality of the tobacco. 4. Lime and magnesium oxide increased the quality of the tobacco. 5. The other sources of nitrogen used failed to increase the quality of the tobacco, as far as price per pound was concerned, beyond the price of the tobacco produced with ammonium sulfate. 6. The burning rates of cigars made with tobacco fertilized with various nitrogen sources showed urea to give the slowest rate of burning, and a mixture of urea and cottonseed meal the most rapid. Ammonium sulfate as a nitrogen source was about intermediate between these. 7. The nicotine content of the tobacco increased with applications of nitrogen up to the 100-pound-per-acre level. Phosphate and potash applications tended to lower the nicotine content of the tobacco leaf. 8. A discussion of the influence of fertilizers on quality of the tobacco is presented to aid the farmer in his use of fertilizer to increase tobacco quality. Warning is also given that these relationships on the relation between yield and quality of tobacco cannot be regarded as applicable to all commercial tobacco-growing in Puerto Rico until further work is done on other tobacco soils.
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Claims 15
Claim · model-written summary
50 pounds per acre of nitrogen significantly increased tobacco quality versus no nitrogen.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- 50 pounds per acre of nitrogene0
- Outcome
- quality of the tobaccoe0
- Direction
- increasede0
- Comparator
- no-nitrogen treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of 50 pounds per acre of nitrogen increased the quality of the tobacco significantly when compared to the no-nitrogen treatment”
Claim · model-written summary
Nitrogen up to 150 pounds per acre did not significantly raise yield above 50 pounds per acre.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Rates up to 150 pounds per acre of nitrogene0
- Outcome
- yielde0
- Direction
- did not increasee0
- Comparator
- 50-pound-per-acre nitrogen treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rates up to 150 pounds per acre of nitrogen did not increase significantly either yield or quality of tobacco per acre over the 50-pound-per-acre nitrogen treatment”
Claim · model-written summary
Nitrogen up to 150 pounds per acre did not significantly raise tobacco quality above 50 pounds per acre.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Rates up to 150 pounds per acre of nitrogene0
- Outcome
- quality of tobacco per acree0
- Direction
- did not increasee0
- Comparator
- 50-pound-per-acre nitrogen treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rates up to 150 pounds per acre of nitrogen did not increase significantly either yield or quality of tobacco per acre over the 50-pound-per-acre nitrogen treatment”
Claim · model-written summary
High nitrogen applications did not reduce tobacco quality.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- high nitrogen applicationse0
- Outcome
- quality of the tobaccoe0
- Direction
- not reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the quality of the tobacco was not reduced by the high nitrogen applications”
Claim · model-written summary
Phosphates failed to increase tobacco quality.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Phosphatese0
- Outcome
- quality of the tobaccoe0
- Direction
- failed to increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphates and potash failed to increase the quality of the tobacco”
Claim · model-written summary
Potash failed to increase tobacco quality.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- potashe0
- Outcome
- quality of the tobaccoe0
- Direction
- failed to increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphates and potash failed to increase the quality of the tobacco”
Claim · model-written summary
Lime increased tobacco quality.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Limee0
- Outcome
- quality of the tobaccoe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lime and magnesium oxide increased the quality of the tobacco”
Claim · model-written summary
Magnesium oxide increased tobacco quality.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- magnesium oxidee0
- Outcome
- quality of the tobaccoe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lime and magnesium oxide increased the quality of the tobacco”
Claim · model-written summary
Other nitrogen sources did not improve tobacco price per pound beyond ammonium sulfate.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- other sources of nitrogene0
- Outcome
- price per pounde0
- Direction
- failed to increasee0
- Comparator
- ammonium sulfatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The other sources of nitrogen used failed to increase the quality of the tobacco, as far as price per pound was concerned, beyond the price of the tobacco produced with ammonium sulfate”
Claim · model-written summary
Urea yielded the slowest cigar burning rate.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- ureae0
- Outcome
- rate of burninge0
- Direction
- sloweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“urea to give the slowest rate of burning”
t0“Tobacco”
Claim · model-written summary
Urea with cottonseed meal yielded the most rapid cigar burning rate.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- a mixture of urea and cottonseed meale0
- Outcome
- most rapide0
- Direction
- most rapide0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a mixture of urea and cottonseed meal the most rapid”
t0“Tobacco”
Claim · model-written summary
Ammonium sulfate yielded an intermediate cigar burning rate.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- Ammonium sulfatee0
- Outcome
- about intermediatee0
- Direction
- about intermediatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ammonium sulfate as a nitrogen source was about intermediate between these”
t0“Tobacco”
Claim · model-written summary
Nitrogen increased tobacco nicotine content through 100 pounds per acre.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- applications of nitrogen up to the 100-pound-per-acre levele0
- Outcome
- nicotine content of the tobaccoe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nicotine content of the tobacco increased with applications of nitrogen up to the 100-pound-per-acre level”
Claim · model-written summary
Phosphate tended to lower tobacco leaf nicotine content.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Phosphatee0
- Outcome
- nicotine content of the tobacco leafe0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphate and potash applications tended to lower the nicotine content of the tobacco leaf”
Claim · model-written summary
Potash tended to lower tobacco leaf nicotine content.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- potashe0
- Outcome
- nicotine content of the tobacco leafe0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphate and potash applications tended to lower the nicotine content of the tobacco leaf”
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See all 39 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.