Abstract
Research is ongoing to develop greenhouse technology with controls economical on water and energy, to improve farming in water-scarce, hot, semi-arid region of north-west India. A greenhouse under investigation, is coupled to earth-tube–heat– exchanger (ETHE) and has provisions for shading, natural ventilation and mist nozzles. In a recent round tomatoes were grown. A regime of natural ventilation and top shading kept the greenhouse temperature close to the ambient in cooler months, although a difference of up to 3 °C was anticipated. Evaporation and later transpiration may have aided cooling. Mist was not used. This became less effective in warmer period as cooling load increased and dense foliage appeared to hinder ventilation. Forced ventilation via ETHE and top shading was then implemented. Inside temperature occasionally rose 2- 3 °C above the ambient. But cropping could be done through spring and early summer. Heating was affectively achieved with ETHE in cold nights of December and January keeping the inside temperatures well above 12°C. Yield was 68 t / ha nearly twice the open fields, water used 266 mm nearly half of the open-fields. This appears to be a promising new way to improve livelihoods from farming.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-sa. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
Natural ventilation and top shading kept greenhouse temperature close to ambient in cooler months.
- Taxon
- tomatoes
Solanum lycopersicume1 - Treatment
- natural ventilation and top shadinge2
- Outcome
- greenhouse temperaturee2
- Direction
- close toe2
- Comparator
- ambiente2
- Setting
- cooler monthse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In a recent round tomatoes were grown”
e2“A regime of natural ventilation and top shading kept the greenhouse temperature close to the ambient in cooler months”
Claim · model-written summary
Forced ventilation via ETHE and top shading let inside temperature occasionally rise 2-3 °C above ambient.
- Taxon
- tomatoesSolanum lycopersicume1
- Treatment
- Forced ventilation via ETHE and top shadinge2
- Outcome
- Inside temperaturee3
- Direction
- rosee3
- Value
- 2- 3 °Ce3
- Comparator
- ambiente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In a recent round tomatoes were grown”
e2“Forced ventilation via ETHE and top shading was then implemented”
e3“Inside temperature occasionally rose 2- 3 °C above the ambient”
Claim · model-written summary
ETHE heating kept inside temperatures well above 12°C on cold nights in December and January.
- Taxon
- tomatoesSolanum lycopersicume1
- Treatment
- ETHEe4
- Outcome
- inside temperaturese4
- Direction
- well abovee4
- Value
- 12°Ce4
- Setting
- cold nights of December and Januarye4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In a recent round tomatoes were grown”
e4“Heating was affectively achieved with ETHE in cold nights of December and January keeping the inside temperatures well above 12°C”
Claim · model-written summary
The greenhouse with ground coupling shading and natural ventilation gave a tomato yield of 68 t/ha, nearly twice the open-field yield.
- Taxon
- tomatoesSolanum lycopersicume1
- Treatment
- Greenhouse with Ground Coupling Shading and Natural Ventilationt1
- Outcome
- Yielde5
- Direction
- nearly twicee5
- Value
- 68 t / hae5
- Comparator
- open fieldse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In a recent round tomatoes were grown”
t1“Greenhouse with Ground Coupling Shading and Natural Ventilation”
e5“Yield was 68 t / ha nearly twice the open fields”
Claim · model-written summary
The greenhouse with ground coupling shading and natural ventilation used 266 mm of water, nearly half of the open-field amount.
- Taxon
- tomatoesSolanum lycopersicume1
- Treatment
- Greenhouse with Ground Coupling Shading and Natural Ventilationt1
- Outcome
- water usede6
- Direction
- nearly halfe6
- Value
- 266 mme6
- Comparator
- open-fieldse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In a recent round tomatoes were grown”
t1“Greenhouse with Ground Coupling Shading and Natural Ventilation”
e6“water used 266 mm nearly half of the open-fields”
The same questions in other papers
shade · soil: physics · Solanum lycopersicum (tomato)Results differ
2 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 papers →shade · yield · Solanum lycopersicum (tomato)Results differ
25 papers in the same direction as this paper · 18 in the opposite direction
- negative
- negative
- negative
40 papers more in this group
See all 44 papers →cultivation system · yield · Solanum lycopersicum (tomato)Positive and negative results
77 papers in the same direction as this paper · 18 in the opposite direction · 7 reporting no difference from an alternative
- negative
- negative
- no effect
99 papers more in this group
See all 103 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.