Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 31 for “"Canopy Temperature"”.
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High Throughput Phenotypic Evaluation of Drought-related Traits in Soybean
… of increasing severity (deficit 1, and 2). After canopy closure, aerial infrared images were taken to determine the relative canopy temperature. Soybean leaves sampled at late R5 and seed at harvest were collected to measure Δ13C (leaf and seed) and δ18O (seed) as surrogate measurements for water …
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High-throughput phenotyping and genetic mapping of drought stress related traits in setaria (Setaria spp) and rice (Oryza spp)
… genetic variation in stomatal density, alongside canopy temperature as a proxy for canopy water use, in the model C4 plant, Setaria. An optical profilometer was used to generate a quantitative measurement of a patch of leaf surface to rapidly assess stomatal patterning. And the canopy temperature …
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Morpho-Physiological responses of spring wheat(Triticum Aestivum L.) to heat stress
Constant or transitory high temperatures affect wheat growth and development leading to diverse morphological, physiological and biochemical changes that eventually decrease grain yield. It is against this background that this study was conducted to identify morpho-physiological traits associated …
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Morpho-Physiological responses of spring wheat(Triticum Aestivum L.) to heat stress
Constant or transitory high temperatures affect wheat growth and development leading to diverse morphological, physiological and biochemical changes that eventually decrease grain yield. It is against this background that this study was conducted to identify morpho-physiological traits associated …
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Identification of Disease Stress in Turfgrass Canopies Using Thermal Imagery and Automated Aerial Image Analysis
… for detecting disease within the turfgrass canopy. Herein, we look at two such techniques to assess their viability in detecting and isolating turfgrass diseases. First, thermal imagery is used to detect differences in canopy temperature associated with the onset of brown patch infection in …
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Autonomous Multi-Sensor and Web-Based Decision Support for Crop Diagnostics in Greenhouse
… and color brightness), morphology (top projected canopy area), textural (entropy, energy, contrast, and homogeneity), Normalized Difference Vegetative Index (NDVI) (as well as other similar indices from the color and NIR channels), and thermal (plant and canopy temperature). Several experiments …
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Genomic and Physiological Approaches to Improve Drought Tolerance in Soybean
… ratio (δ18O, associated with transpiration), canopy temperature (CT), canopy wilting, and canopy coverage (CC) are promising physiological traits associated with improvement of drought tolerance. Genome-wide association studies (GWAS) are one of the genomic approaches to provide a high mapping …
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Developmental and physiological responses of soybean to elevated growing temperatures
Rising temperatures have reduced soybean yields in key production regions and will have a net-negative impact on global yields. Improvements in genetics, technology, and agricultural intensification have increased yields over the past decades, however adverse climate conditions may prevent these …
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Reflective mulch effects on the grapevine environment, Pinot noir vine performance, and juice and wine characteristics
… of three replicates. Soil parameters tested were temperature, moisture, microbial biomass carbon, dehydrogenase enzyme activity and nutrient levels. Also investigated were canopy temperature and radiation reflected from each treatment. Vine parameters included nutrient levels, photosynthesis, leaf …
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Interactive effects of elevated carbon dioxide concentration and water availability on field-grown soybean (Glycine max)
… gs in elevated [CO2] will decrease plant and canopy water use, conserving soil moisture and ameliorating drought stress. Additionally, stimulation of A by elevated [CO2] often results in increased root biomass, and this is predicted to improve plant access to soil water, enabling avoidance of …
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Cyclic irrigation of turfgrass using a shallow saline aquifer
… leaching fraction of 0.15. Turf color and cover, canopy temperature, bulk soil conductivity, soil moisture, leaf water potential, tissue moisture content and stomatal conductance were monitored on a bimonthly basis during the peak demand months. All plots except for control, were instrumented with …
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Deficit Irrigation Strategies on young orange trees (cv Tarocco Sciara)
… measurements of LAI, PAR, xylematic potential, canopy temperature, gas exchanges, trunk diameter and shoot number were carried out. Soil water content (SWC) was monitored by using Time (and Frequency) Domain Reflectometry. Preliminary results, obtained during the 2011 season, showed that: (i) …
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Water-use efficiency, photosynthetic characteristics, and high through-put phenotyping methods for soybean (glycine max) genotypes contrasting in carbon isotope discrimination
… the genotypes. Thermal images to estimate canopy temperature and sap flow sensors to estimate field water use provided excellent insight into differences among watering treatments and genotypes for transpiration rates. This research demonstrates, that in soybean, CID can be used as a …
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Forage Production and Nutritive Value in a Temperate Appalachian Silvopasture
… nutritive value characteristics. Soil surface temperature, forage canopy temperature, soil moisture, and photosynthetically active radiation were measured to determine forage responses to field treatments as functions of resource allocation. Tree density had the greatest effect on forage …
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Behavior of and Crop Injury Induced by Native and Exotic Stink Bugs in Mid-Atlantic Soybean
… per day and compared with ambient and within-canopy temperature and relative humidity. Results indicated that these conditions did not influence the percentage of stink bugs below the top 38 cm sweep net intercept zone. In both years of observations, between 15 and 20% of stink bugs were …
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The effect of non-glaucousness, as conferred by Inhibitor of Wax 1, on physiology and yield of UK Wheat
… active radiation (PAR) reflectance by 15-40% and canopy reflectance by 12-20% (p<0.05). Despite this, Iw1 did not affect flag leaf PAR absorbance or canopy temperature, and conferred no advantage under long-term shading. Furthermore, there was no difference between NILs in photoinhibition …
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Optimizing Weed Management via Microwave Irradiation
… more likely to regrow after treatment. Ambient temperature had a significant effect on injuries caused by microwave radiation to target weeds, with control increasing as the air temperature increased. Weed control using microwave radiation required more energy when weeds were treated at 13 C …
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Genetics of Physiological Traits Associated with Drought Tolerance in Soybean (Glycine max)
… is negatively correlated with N2 fixation; canopy temperature (CT) is an indicator for genetic variation in transpiration and stomatal conductance. Therefore, the objectives of this research were to identify the genomic regions associated with: (1) δ13C and δ15N using a population of 196 …
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