Abstract
Four discrete humidity treatments (0.1,0.2,0.4 and 0.8 kPa vapour pressure deficit) were maintained continuously for 28 days from mid-January and their effect on the growth and yield of a long-season tomato crop was investigated. The average vapour pressure deficits achieved over the 28 day period were 0.15,0.25,0.43 and 0.65 kPa for the four treatments respectively. Temperature differences between the treatments were less than 0.2°C. The rate of plant development was unaffected by humidity. Significant reductions in leaf area at high humidities were associated with low calcium concentrations in the leaf laminae and calcium deficiency symptoms. There were no calcium deficiency symptoms in the fruit. The trusses associated with the smaller leaves resulting from high humidity, produced smaller fruit and thereby a lower yield compared with the low humidity treatments. Fruit yields produced before and after these trusses were picked, were unaffected by the humidity treatments. High humidity also reduced fruit quality. It was concluded that the cost of reducing humidity to vapour pressure deficits greater than 0.3 kPa was likely to exceed any economic gain, because the yield response to lower humidities was very small.
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Claims 10
Claim · model-written summary
Humidity did not affect the rate of tomato development.
- Taxon
- tomatoes
Solanum lycopersicumt0 - Treatment
- humiditye0
- Outcome
- rate of plant developmente0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of plant development was unaffected by humidity.”
t0“tomatoes”
Claim · model-written summary
High humidity significantly reduced tomato leaf area.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- high humiditiese0
- Outcome
- leaf areae0
- Direction
- reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant reductions in leaf area at high humidities were associated with low calcium concentrations in the leaf laminae and calcium deficiency symptoms.”
t0“tomatoes”
Claim · model-written summary
Reduced leaf area at high humidity was associated with low leaf lamina calcium concentration.
- Taxon
- tomatoesSolanum lycopersicumt0
- Organ / stage
- leaf laminaee0
- Treatment
- high humiditiese0
- Outcome
- low calcium concentrations in the leaf laminaee0
- Direction
- lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant reductions in leaf area at high humidities were associated with low calcium concentrations in the leaf laminae and calcium deficiency symptoms.”
t0“tomatoes”
Claim · model-written summary
Reduced leaf area at high humidity was associated with leaf calcium deficiency symptoms.
- Taxon
- tomatoesSolanum lycopersicumt0
- Organ / stage
- leaf laminaee0
- Treatment
- high humiditiese0
- Outcome
- calcium deficiency symptomse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant reductions in leaf area at high humidities were associated with low calcium concentrations in the leaf laminae and calcium deficiency symptoms.”
t0“tomatoes”
Claim · model-written summary
Tomato fruit showed no calcium deficiency symptoms.
- Taxon
- tomatoesSolanum lycopersicumt0
- Organ / stage
- fruite0
- Outcome
- no calcium deficiency symptomse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no calcium deficiency symptoms in the fruit.”
t0“tomatoes”
Claim · model-written summary
Trusses with smaller leaves under high humidity produced smaller fruit.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- high humiditye0
- Outcome
- smaller fruite0
- Direction
- smallere0
- Comparator
- low humidity treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The trusses associated with the smaller leaves resulting from high humidity, produced smaller fruit and thereby a lower yield compared with the low humidity treatments.”
t0“tomatoes”
Claim · model-written summary
Trusses with smaller leaves under high humidity produced lower yield than low humidity treatments.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- high humiditye0
- Outcome
- yielde0
- Direction
- lowere0
- Comparator
- low humidity treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The trusses associated with the smaller leaves resulting from high humidity, produced smaller fruit and thereby a lower yield compared with the low humidity treatments.”
t0“tomatoes”
Claim · model-written summary
Fruit yields before and after the affected trusses were unaffected by humidity.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- humidity treatmentse0
- Outcome
- Fruit yields produced before and after these trusses were pickede0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit yields produced before and after these trusses were picked, were unaffected by the humidity treatments.”
t0“tomatoes”
Claim · model-written summary
High humidity reduced tomato fruit quality.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- High humiditye0
- Outcome
- fruit qualitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High humidity also reduced fruit quality.”
t0“tomatoes”
Claim · model-written summary
The authors concluded that reducing humidity below a 0.3 kPa vapour pressure deficit was unlikely to pay economically.
- Taxon
- tomatoesSolanum lycopersicumt0
- Outcome
- the cost of reducing humidity to vapour pressure deficits greater than 0.3 kPa was likely to exceed any economic gaine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cost of reducing humidity to vapour pressure deficits greater than 0.3 kPa was likely to exceed any economic gain, because the yield response to lower humidities was very small.”
t0“tomatoes”
The same questions in other papers
humidity · yield · Solanum lycopersicum (tomato)Results differ
5 papers in the same direction as this paper · 11 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 papers →humidity · growth · Solanum lycopersicum (tomato)Positive and negative results
11 papers in the same direction as this paper · 10 in the opposite direction
- positive
- negative
- no effect
18 papers more in this group
See all 22 papers →humidity · quality: grain · Solanum lycopersicum (tomato)Results agree
1 paper in the same direction as this paper
- negative
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.