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.
Results
Showing 1 to 7 of 7 for “"leaf quality"”.
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Studies of Low-Nicotine Flue-Cured Tobacco Production
… has been managed to optimize the yield of high-quality cured leaf while maintaining nicotine levels within a relatively narrow range based on the Regional Minimum Standards Program. Among the 3,000 plus alkaloids found in tobacco, nicotine accounts for greater than 90% of the total alkaloids …
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Strip-till flue-cured tobacco production in Virginia
… broadcast killed had no effect on yield or cured leaf quality. Soybean residue did not provide adequate soil cover, but was shown to be a suitable ground cover option for tobacco production. Wheat not topdressed with nitrogen and tobacco receiving normal fertilization had adequate soil surface …
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Strip-Tillage Production Systems for Tobacco
… in consistently lower yields and inferior cured leaf quality. The development of new conservation tillage equipment, improved methods of fertilizer application, and new herbicides, have resulted in a renewed interest in conservation tillage labeled for tobacco. This research investigated …
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Quantification of tobacco aphid, Myzus nicotianae Blackman, injury to flue-cured tobacco, Nicotiana tabacum (L.)
… response of tobacco production variables, cured leaf quality, and cured leaf chemical analysis to the level of cumulative aphid-days. Aphid populations and tobacco plant responses were recorded on an individual plant basis. A gradient in cumulative aphid-days was obtained through the use of …
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Influences of Mountainside Residential Development to Nutrient Dynamics in a Stream Network
… research, I first developed models for leaf decomposition in a forested headwater stream by synthesizing several important ecological concepts, including ecological stoichiometry, microbial nutrient mining, and microbe-substrate interaction. I then extended the single stream model to a …
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Influence of cultivar, topping height, and harvest treatment on physical and chemical characteristics of flue-cured tobacco
… tip grade tobacco. Agronomic and cured leaf chemistry data were collected. Cultivar had significant influences on yield, average price, grade index, and value in three growing seasons. NC 71 and RG H51 were the highest yielding cultivars, with grade indices among the highest as well. …
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Understanding tropical forest dynamics through remote sensing and deep learning
… in diverse forests follow a similar pattern of leaf pigment changes, leaf flushing and loss remains unknown. I begin to address that knowledge gap by tracking phenology through drone-mounted sensors, providing a dataset that tracked individual trees in French Guiana at 3-weekly intervals over 34 …