Abstract
Lettuce grown in nutrient solution sometimes showed slight benefit on a dry‐weight basis from the addition of 0.1 p.p.m. Cr, Sr, Ti or V, while Zn was usually harmful. Addition of Mo at a similar concentration, however, exerted such a marked beneficial effect on both yield and appearance as to suggest that this element was essential for healthy growth. Confirmation of the response was not always obtained, and search was made for some factor which would account for the lack of uniformity in the results. Neither the season of the year, the variety, modifications in the nutrient solution, nor the addition of other trace elements appeared to be responsible, and further work is necessary for the elucidation of the problem.
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Claims 4
Claim · model-written summary
Chromium, strontium, titanium, or vanadium sometimes slightly benefited lettuce dry weight.
- Taxon
- Lettuce
Lactuca sativae0 - Treatment
- 0.1 p.p.m. Cr, Sr, Ti or Ve0
- Outcome
- dry‐weighte0
- Direction
- benefite0
- Qualifier
- sometimese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce grown in nutrient solution sometimes showed slight benefit on a dry‐weight basis from the addition of 0.1 p.p.m. Cr, Sr, Ti or V”
Claim · model-written summary
Zinc was usually harmful to lettuce.
- Taxon
- LettuceLactuca sativae0
- Treatment
- Zne0
- Outcome
- harmfule0
- Qualifier
- usuallye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce grown in nutrient solution sometimes showed slight benefit on a dry‐weight basis from the addition of 0.1 p.p.m. Cr, Sr, Ti or V, while Zn was usually harmful”
Claim · model-written summary
Molybdenum markedly benefited lettuce yield and appearance, although the response was not always confirmed.
- Taxon
- lettuceLactuca sativat0
- Treatment
- Moe0
- Outcome
- yield and appearancee0
- Direction
- beneficial effecte0
- Qualifier
- Confirmation of the response was not always obtainede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of Mo at a similar concentration, however, exerted such a marked beneficial effect on both yield and appearance”
e1“Confirmation of the response was not always obtained”
t0“lettuce”
Claim · model-written summary
Season, variety, nutrient-solution changes and other trace elements did not account for inconsistent lettuce responses.
- Taxon
- lettuceLactuca sativat0
- Outcome
- appeared to be responsiblee0
- Qualifier
- season of the year, the variety, modifications in the nutrient solution, nor the addition of other trace elementse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither the season of the year, the variety, modifications in the nutrient solution, nor the addition of other trace elements appeared to be responsible”
t0“lettuce”
The same questions in other papers
molybdenum atom · yield · Lactuca sativa (garden lettuce)Results agree
5 papers in the same direction as this paper
- positive
- 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.