Abstract
SUMMARY The rate of germination of tomato seeds is practically unaffected when the seed boxes are exposed to atmospheres enriched with carbon dioxide. Increases of over 20 per cent, in marketable tomato crops result when the plants are subjected to atmospheres containing 0.6 per cent, of CO 2 for 1 or 2 hours daily. Cucumbers heated with atmospheres containing 0.9 per cent. CO 2 for 1 hour daily showed an increase in crop of 16 per cent. In the case of the 1925 tomato crop, and to a less degree of the 1924 crop, a considerable part of the increased picking is manifested in June, when market prices are high. In its effect on the crop carbon dioxide generated slowly at the soil surface is not as beneficial as the gas when generated quickly and mixed with the air surrounding the plants. Plants grown in houses which have been used for carbon dioxide experiments show an increased susceptibility to infection by Colletotrichum atramentarium. When carbon dioxide is generated quickly in a house an appreciable loss of this gas always occurs. This loss appears to be independent of temperature and varies directly with the amount of ventilation. Experiments with apparatus devised for the use of carbon dioxide on a commercial scale were unsuccessful owing to the inadequacy of the apparatus.
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Claims 10
Claim · model-written summary
Atmospheres enriched with carbon dioxide practically did not change the germination rate of tomato seeds.
- Taxon
- tomato
Solanum lycopersicume1 - Treatment
- atmospheres enriched with carbon dioxidee1
- Outcome
- rate of germinatione1
- Direction
- practically unaffectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The rate of germination of tomato seeds is practically unaffected when the seed boxes are exposed to atmospheres enriched with carbon dioxide”
Claim · model-written summary
Carbon dioxide at 0.6% for 1 or 2 hours daily increased marketable tomato crops by over 20%.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- atmospheres containing 0.6 per cent, of CO 2 for 1 or 2 hours dailye2
- Outcome
- marketable tomato cropse2
- Direction
- Increasese2
- Value
- over 20 per cente2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Increases of over 20 per cent, in marketable tomato crops result when the plants are subjected to atmospheres containing 0.6 per cent, of CO 2 for 1 or 2 hours daily”
Claim · model-written summary
A considerable part of the increased picking of the 1925 tomato crop was manifested in June, when market prices were high.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- increased pickinge0
- Qualifier
- manifested in June, when market prices are highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the case of the 1925 tomato crop, and to a less degree of the 1924 crop, a considerable part of the increased picking is manifested in June, when market prices are high”
Claim · model-written summary
Cucumbers exposed to 0.9% carbon dioxide for 1 hour daily showed a 16% increase in crop.
- Taxon
- Cucumbers
Cucumis sativuse3 - Treatment
- atmospheres containing 0.9 per cent. CO 2 for 1 hour dailye3
- Outcome
- crope3
- Direction
- increasee3
- Value
- 16 per cente3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Cucumbers heated with atmospheres containing 0.9 per cent. CO 2 for 1 hour daily showed an increase in crop of 16 per cent”
Claim · model-written summary
Carbon dioxide generated slowly at the soil surface is not as beneficial for the crop as the gas generated quickly and mixed with the air.
Verbatim
e4“In its effect on the crop carbon dioxide generated slowly at the soil surface is not as beneficial as the gas when generated quickly and mixed with the air surrounding the plants”
t0“CARBON DIOXIDE IN RELATION TO GLASSHOUSE CROPS”
Claim · model-written summary
Glasshouse plants grown in houses used for carbon dioxide experiments showed increased susceptibility to infection by Colletotrichum atramentarium.
Verbatim
e5“Plants grown in houses which have been used for carbon dioxide experiments show an increased susceptibility to infection by Colletotrichum atramentarium”
t0“CARBON DIOXIDE IN RELATION TO GLASSHOUSE CROPS”
Claim · model-written summary
The loss of carbon dioxide in glasshouses appears independent of temperature.
Verbatim
e6“This loss appears to be independent of temperature and varies directly with the amount of ventilation”
t0“CARBON DIOXIDE IN RELATION TO GLASSHOUSE CROPS”
Claim · model-written summary
The loss of carbon dioxide in glasshouses varies directly with the amount of ventilation.
Verbatim
e6“This loss appears to be independent of temperature and varies directly with the amount of ventilation”
t0“CARBON DIOXIDE IN RELATION TO GLASSHOUSE CROPS”
Claim · model-written summary
An appreciable loss of carbon dioxide always occurs when the gas is generated quickly in a house.
Verbatim
e7“When carbon dioxide is generated quickly in a house an appreciable loss of this gas always occurs”
t0“CARBON DIOXIDE IN RELATION TO GLASSHOUSE CROPS”
Claim · model-written summary
Experiments with apparatus for commercial-scale carbon dioxide use were unsuccessful.
Verbatim
e0“Experiments with apparatus devised for the use of carbon dioxide on a commercial scale were unsuccessful owing to the inadequacy of the apparatus”
t0“CARBON DIOXIDE IN RELATION TO GLASSHOUSE CROPS”
The same questions in other papers
co2 · quality: postharvest · Solanum lycopersicum (tomato)Results differ
12 papers in the same direction as this paper · 4 in the opposite direction
- positive
- negative
- no effect
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See all 75 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.