Emergency +: mobile app user guide

Anderson, Nash; Sharp, Natalie

doi:10.1136/bjsports-2017-097775

Cited by 4 publications

(4 citation statements)

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“…The mean temperature (˚C) in the NFT setup ranged between 22.17˚C -28.11˚C and 22.90˚C -27.30˚C in the DWC setup. The temperature regime was within the optimal range of 17˚C -28˚C [24]. There was minimal temperature variation due to the indoor grow tent and thermal insulation inside both GREENBOX units.…”

Section: Resultsmentioning

confidence: 92%

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The Comparative Performance of Nutrient-Film Technique and Deep-Water Culture Method of Hydroponics for GREENBOX Technology

Griffith,

Buss,

Carroll

et al. 2023

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Section: Resultsmentioning

confidence: 92%

“…Using a mobile device (iPhone 12 mini, Apple Inc., Cupertino, California), the leaf area was measured using the Leafscan app [24]. First, a reference measurement was made by drawing four dots on a blank piece of paper in the shape of a square.…”

Section: Data Acquisitionmentioning

confidence: 99%

The Comparative Performance of Nutrient-Film Technique and Deep-Water Culture Method of Hydroponics for GREENBOX Technology

Griffith,

Buss,

Carroll

et al. 2023

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“…Reduced specific leaf area (SLA) is often associated with reduced transpiration and represents one mechanism by which plants may conserve water and tolerate drought (Harrison and LaForgia, 2019). Just prior to the onset of the terminal drought, we collected a single leaf (either the 2nd or 3rd true leaf) from each seedling that was at least 5 mm tall, and calculated its fresh area using the Leafscan app for iOS (Anderson and Rosas‐Anderson, 2017). We then dried the leaves at 70°C for 24 hours and measured dried leaf mass, and calculated SLA as leaf area (mm 2 ) divided by leaf dry mass (mg).…”

Section: Methodsmentioning

confidence: 99%

Resurrected seeds from herbarium specimens reveal rapid evolution of drought resistance in a selfing annual

Christie,

Pierson,

Holeski

et al. 2023

American J of Botany

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PremiseIncreased aridity and drought associated with climate change are exerting unprecedented selection pressures on plant populations. Whether populations can rapidly adapt, and which life history traits might confer increased fitness under drought, remain outstanding questions.MethodsWe utilized a resurrection ecology approach, leveraging dormant seeds from herbarium collections to assess whether populations of Plantago patagonica from the semi‐arid Colorado Plateau have rapidly evolved in response to approximately ten years of intense drought in the region. We quantified multiple traits associated with drought escape and drought resistance and assessed the survival of ancestors and descendants under simulated drought.ResultsDescendant populations displayed a significant shift in resource allocation, in which they invested less in reproductive tissues and relatively more in both above‐ and below‐ground vegetative tissues. Plants with greater leaf biomass survived longer under terminal drought; moreover, even after accounting for the effect of increased leaf biomass, descendant seedlings survived drought longer than their ancestors.ConclusionsOur results document rapid adaptive evolution in response to climate change in a selfing annual and suggest that shifts in tissue allocation strategies may underlie adaptive responses to drought in arid or semi‐arid environments. This work also illustrates a novel approach, documenting that under specific circumstances, seeds from herbarium specimens may provide an untapped source of dormant propagules for future resurrection experiments.

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“…We stored the leaves in a dry brown paper bag and left them in a forced air convection oven for six days at 65°C to obtain the dry weight of the crop. We used the leafscan app (Anderson et al, 2017) to obtain the lettuce head area and total leaf area. The measurements were obtained on a smartphone (iPhone XR, Apple Inc., Cupertino, California), exported to a CSV file, and processed in square centimeter units .…”

Section: Data Acquisitionmentioning

confidence: 99%

GREENBOX Technology II - Comparison of Environmental Conditions, Productivity, and Water Consumption With Greenhouse Operation

Singh,

Bravo-Ureta,

McAvoy

et al. 2023

Journal of the ASABE

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Highlights Increasing population, demand, and urbanization have increased food security pressures. We compared GREENBOX with a greenhouse for urban crop production. GREENBOX and greenhouse provided the required environmental conditions and comparable biomass output year-round. GREENBOX performance is comparable to a greenhouse for urban crop production but with more advantages. Abstract. The Yang Laboratory at the University of Connecticut has developed the GREENBOX technology for growing fresh produce in urban areas to meet the increasing demand for sustainable and local food production. Previous studies have shown that GREENBOX units can provide the desired environmental conditions to sustain crop production in midlatitude urban warehouse environments. This study was conducted to compare the environmental conditions, productivity, and water consumption for growing lettuce between GREENBOX and a conventional greenhouse that has been widely applied for crop production. Two modular GREENBOX units, equipped with LED lighting, hydroponic growing platform, and climate controls, were located in a high ceiling headhouse of a greenhouse complex to mimic warehouse conditions. We used bays in a nearby greenhouse that was glass glazed, equipped with supplemental lighting, and fully controlled by an Argus Titan control system for comparison purposes. Forty-eight (48) heads of Butterhead Rex lettuce (Lactuca sativa) were grown over four 30-day cycles in spring, summer, fall, and winter in the GREENBOX units and the greenhouse bays, respectively, at the University of Connecticut, Storrs, Connecticut, United States. Environmental variables, including light, temperature, relative humidity, and carbon dioxide concentration, were measured at a frequency of every minute. Biomass data of wet weight, dry weight, total leaf area, and lettuce head area were collected using destructive and non-destructive methods every three days. The water consumption rate was logged using a lysimeter. We derived the Daily Light Integral (DLI), Leaf Area Index (LAI), Specific Leaf Area (SLA), productivity, and water consumed per lettuce head, per unit wet weight, and per unit dry weight from the measurements. Results were analyzed using descriptive statistics and ANOVA. The DLI values in the GREENBOX units were significantly higher than the recommended minimum DLI by over 20 mol/m2.d in the GREENBOX units and over 10 mol/m2.d in the greenhouse bays. The range of the daily temperature variation is only a few degrees in the GREENBOX units, while in the greenhouse bays was over 20°C. The average daily temperature in both growing locations fell within the optimal range of 17-29°C for lettuce. The relative humidity inside both growing locations fell primarily within the optimal range of 40%-60%. The mean CO2 concentrations inside both growing locations were slightly lower than the ambient concentration of 350 ppm. Measured parameters such as LAI, SLA, and productivity followed similar patterns, slightly different amongst seasons and higher in warmer seasons. ANOVA revealed a slightly (statistically insignificant) higher level of productivity in the GREENBOX units over the greenhouse bays (p=0.16), with higher values during the warmer seasons (p=0.72 in spring and summer). GREENBOX used 1.83-2.69 L of water per lettuce head, while the greenhouse bays used 1.69-3.84 L of water per lettuce head year-round. The water use was consistently lower in the GREENBOX units. We found that the GREENBOX units and greenhouse bays provided comparable environmental conditions, biomass output, and water consumption. Those variables, however, were more consistent in the GREENBOX units. GREENBOX environment was less affected by outside weather and, therefore, exhibited reduced fluctuations. The GREENBOX is advantageous over the greenhouse as it does not require arable or open land for intercepting sunlight and can be operated in available urban buildings such as warehouses. Keywords: GREENBOX, Greenhouse, Lettuce, Productivity, Water use.

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Emergency +: mobile app user guide

Cited by 4 publications

References 0 publications

The Comparative Performance of Nutrient-Film Technique and Deep-Water Culture Method of Hydroponics for GREENBOX Technology

The Comparative Performance of Nutrient-Film Technique and Deep-Water Culture Method of Hydroponics for GREENBOX Technology

Resurrected seeds from herbarium specimens reveal rapid evolution of drought resistance in a selfing annual

GREENBOX Technology II - Comparison of Environmental Conditions, Productivity, and Water Consumption With Greenhouse Operation

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