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 11 of 11 for “"Canopy reflectance"”.
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Multispectral canopy reflectance and digital imaging to determine maturity
… of soybean canopies were characterized using canopy reflectance and digital imaging tools. Field experiments were conducted in 2014 and 2015 at two Missouri locations to characterize canopy characteristics of six commercial soybean [Glycine max (L.) Merr.] cultivars – two cultivars each of …
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ENHANCEMENT OF A CANOPY REFLECTANCE MODEL FOR UNDERSTANDING THE SPECULAR AND SPECTRAL EFFECTS OF AN AQUATIC BACKGROUND IN AN INUNDATED TIDAL MARSH
… characteristics in an inundated tidal marsh canopy. The aquatic substrate can affect conventional attempts to retrieve canopy characteristics, such as structure information (e.g., canopy height, leaf area index, etc.) or plant species composition. The background reflectance can also influence …
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Improving Early Season Sidedress Nitrogen Rate Prescriptions for Corn
… and N supply is correlated with grain yield. Canopy reflectance has been used to assess crop N needs and to derive optimum application rates in mid-season corn. Canopy reflectance has not been useful for N rate determination in early season corn because of low biomass and the sensing …
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Expanding the Application of Spectral Reflectance Measurement in Turfgrass Systems
Light reflectance from plants can be used as a non-invasive predictor of health and yield for many cropping systems, and has been investigated to a lesser extent with managed turfgrass systems. The frequent agronomic inputs associated with maintaining golf course grasses allow for exceptional stand …
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Relationships between tree rings and Landsat EVI in the Northeast United States
… forests may decouple measures of TRW growth and canopy reflectance. However, results also indicate that there may be important lag effects in which EVI affects mean TRW during the following year. These findings may improve understanding of links between C uptake and growth of tree stems over …
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The effect of non-glaucousness, as conferred by Inhibitor of Wax 1, on physiology and yield of UK Wheat
… leaf photosynthetically 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 …
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Development of high-throughput phenotyping methods and evaluation of morphological and physiological characteristics of peanut in a sub-humid environment
… collection of red-green-blue (RGB) images and canopy reflectance in the visible, near infra-red, and infra-red spectra. This information was used to estimate plant characteristics related to growth and drought tolerance. Under objective 1), we developed HTP for plant height with 85-95% …
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Improving Soil Moisture Assessment of Turfgrass Systems Utilizing Field Radiometry
… dry-down cycles serving as replications. Canopy reflectance and volumetric water content (VWC) data were collected hourly between 0700 and 1900 hr using a hyperspectral radiometer and an embedded soil moisture sensor, until complete turf necrosis. The WBI had the strongest relationship to …
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Advancing Soil Moisture Mapping with Multi-Modal Drone Sensing and AI: Integrating GPR, Hyperspectral, and Thermal Imaging for Precision Agriculture
… estimation in cornfields. By combining surface, canopy, and subsurface information, this research aimed to capture a more complete picture of soil moisture dynamics throughout the growing season. In the first part of the research, the study used RGB-thermal imagery to estimate soil moisture …