Claim · model-written summary
Unventilated houses at high nutrient level yielded 35% more than the control at 1000 μl CO2/liter
- Taxon
- tomatoes
Solanum lycopersicume1 - Treatment
- unventilated housese6
- Outcome
- yieldede7
- Direction
- greatere7
- Value
- 35e7
- Qualifier
- high nutrient levele7
- Comparator
- the controle6
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The yield of 2 crops of tomatoes ( Lycopersicon esculentum Mill. cv. Tropic) was determined in CO 2 enriched, unventilated and conventionally ventilated greenhouses”
e6“At the standard nutrient level, unventilated houses yielded 64 and 63% greater than the control at 1000 and 1350 μl CO 2 /liter, respectively”
e7“At the high nutrient level, they yielded 35 and 37% greater”
Title
Tomato Yields from CO2-enrichment in Unventilated and Conventionally Ventilated Greenhouses1
B. A. Kimball; S. T. Mitchell Journal of the American Society for Horticultural Science 1979. doi:10.21273/jashs.104.4.515
Other claims from this paper (11)
- Intervention effect Unventilated houses enriched with 650 μl CO2/liter had 17% greater tomato yield than the control
- Intervention effect Unventilated houses enriched with 1000 μl CO2/liter had 48% greater tomato yield than the control
- Intervention effect An unventilated, unenriched tomato house suffered a 13% yield decrease
- Observation The ventilated control house yielded 8.58 kg/plant in the first spring crop
- Observation The control house yielded 8.48 kg/plant in the second winter crop at standard nutrient level
- Observation The control house yielded 9.70 kg/plant in the second winter crop at high nutrient level
- Intervention effect Unventilated houses at standard nutrient level yielded 64% more than the control at 1000 μl CO2/liter
- Intervention effect Unventilated houses at standard nutrient level yielded 63% more than the control at 1350 μl CO2/liter
- Intervention effect Unventilated houses at high nutrient level yielded 37% more than the control at 1350 μl CO2/liter
- Intervention effect A ventilated house enriched to 1000 μl/liter when cooling was not required yielded 8% more than the control at standard nutrient level
- Intervention effect A ventilated house enriched to 1000 μl/liter when cooling was not required yielded 10% more than the control at high nutrient level