Abstract
The effect of Ca:K ratios and B nutrition was investigated using tobacco and cotton grown in Mitcherlich pots with sand. A nutrient solution with three different ratios of Ca:K and two boron levels was used. Treatments were arranged factorially (3 × 2) and the tobacco and cotton trials were carried out simultaneously under identical greenhouse conditions. Both crops gave the highest yield of leaves at the low Ca:K ratio. For tobacco, where leaves are the end product, this treatment also delayed deterioration of the leaves on the plant during senescence, especially when sufficient B was supplied. This ensured cured leaves with a high sugar content and good moisture-holding capacity. For cotton, the ability of plants to retain their bolls was best at the intermediate Ca:K ratio, resulting in the highest boll yield and probably indicating a need for a higher Ca:K ratio.
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Claims 7
Claim · model-written summary
Tobacco leaf yield was highest at a low calcium to potassium ratio.
- Taxon
- tobacco
Nicotiana tabacumt0 - Treatment
- low Ca:K ratioe0
- Outcome
- yield of leavese0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both crops gave the highest yield of leaves at the low Ca:K ratio.”
t0“tobacco”
Claim · model-written summary
Cotton leaf yield was highest at a low calcium to potassium ratio.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- low Ca:K ratioe0
- Outcome
- yield of leavese0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both crops gave the highest yield of leaves at the low Ca:K ratio.”
t0“cotton”
Claim · model-written summary
The low calcium to potassium ratio delayed tobacco leaf deterioration during senescence.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- this treatmente0
- Outcome
- deterioration of the leavese0
- Direction
- delayede0
- Qualifier
- especially when sufficient B was suppliede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this treatment also delayed deterioration of the leaves on the plant during senescence, especially when sufficient B was supplied.”
t0“tobacco”
Claim · model-written summary
Tobacco cured leaves had high sugar content.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- sugar contente0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This ensured cured leaves with a high sugar content”
t0“tobacco”
Claim · model-written summary
Tobacco cured leaves had good moisture-holding capacity.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- moisture-holding capacitye0
- Direction
- goode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cured leaves with a high sugar content and good moisture-holding capacity.”
t0“tobacco”
Claim · model-written summary
Cotton boll retention was best at an intermediate calcium to potassium ratio.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- intermediate Ca:K ratioe0
- Outcome
- ability of plants to retain their bollse0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For cotton, the ability of plants to retain their bolls was best at the intermediate Ca:K ratio”
Claim · model-written summary
Cotton boll yield was highest at an intermediate calcium to potassium ratio.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- intermediate Ca:K ratioe0
- Outcome
- boll yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at the intermediate Ca:K ratio, resulting in the highest boll yield”
t0“cotton”
The same questions in other papers
calcium atom · yield · Gossypium hirsutum (cotton)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →calcium atom · yield · Nicotiana tabacum (tobacco)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
2 papers more in this group
See all 6 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.