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 2326 for “"leaf"”.
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Seasonal changes in specific leaf weight and leaf anatomy of apple
… had significant and similar effects on specific leaf weight (SLW), leaf thickness, length of palisade tissue, and number of cell layers in the palisade tissue. Inside canopy leaves had lower SLW, leaf thickness, palisade length, and number of palisade cell layers than middle and outside leaves at …
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Leaf scald of barley
ix, 158 leaves : ill.
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Assessment of Soybean Leaf Area for Redefining Management Strategies for Leaf-Feeding Insects
Commercially available leaf area index (LAI) meters are tools that can be used in making insect management decisions. However, proper technique must be determined for LAI estimation, and accuracy must be validated for the meters. Full-season soybean require LAI values of at least 3.5 to 4.0 by …
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Validated leaf spring suspension models
… will look at creating a validated model of a leaf spring suspension system used on commercial vehicles. The primary goal set for the model is to be able to predict the forces at the points where the suspension system is attached to the vehicle chassis as the model is to be used in full vehicle …
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Cellular patterns during leaf development
… of cell migration and apoptosis makes the leaf of Arabidopsis thaliana an excellent system to study morphogenesis at the cellular level. However the information about the cellular dynamics that is available has only been inferred indirectly or restricted to few cells. In this thesis, I …
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Status of Northen Leaf Blight, Phaeosphaeria maydis Leaf Spot, Southern Leaf Blight, Rust, Maize Streak Virus and Physiologic Specialization of Exserohilum turcicum in Kenya
… over 400 mm long by 25 mm in width. Southern leaf blight caused by Bipolaris maydis was most severe in the Kenyan maize granary located in the highlands west of the Rift Valley where it occurred alone or with Phaeosphaeria maydis leaf spot. Incidences of over 75% were recorded for southern …
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Enumeration Results On Leaf Labeled Trees
<p>ENUMERATION RESULTS ON LEAF LABELED TREES,Virginia P. Johnson In evolutionary biology, it is common practice to represent the evolution of species, populations, and organisms with graphs, called phylogenetic or species trees. These are rooted leaf-labeled trees where non-root internal vertices …
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Olive leaf spot: epidemiology and control
… factors affecting development of olive leaf spot (OLS) in New Zealand olive groves and to develop strategies for the disease management. The effects of temperature, relative humidity (RR), leaf wetness and leaf age on conidium germination were investigated for Spilocaea oieagina, the …
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Hydrolytic enzyme activities in leaf senescense
… however, dark incubation of excised leaf tips diminishes the acid phosphatase response, although it accelerates chlorophyll loss. Acid phosphatase activity does not increase in intact illuminated leaf tissue over a period of three weeks, during which the leaf is nevertheless …
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Radiation Exchange in Controlling Leaf Temperature
Made available in DSpace on 2014-12-10T17:12:46Z (GMT). No. of bitstreams: 1 7013236.pdf: 2245035 bytes, checksum: ee246632a880f5fbd46e1d506c21d97b (MD5) Previous issue date: 1969
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Elevated Atmospheric Carbon Dioxide and Ozone Concentrations Alter Leaf Area Index Through Changes in Leaf Production and Expansion
… for the change differed between the species. Leaf number was increased by elevated [CO2] in aspen, whereas individual leaf size was increased in soybean. Aspen and soybean had similar responses to elevated [O3]. Most previous research has ignored the potential effects of O3 on young leaves and …
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Net photosynthesis, specific leaf weight and growth of apple leaves as affected by canopy position and leaf age
… Blacksburg, Va. The most recently unfolded leaf was tagged on April 28, May 12, and May 26, 1976. Shoot length was unaffected by canopy position but leaf number was greater on exterior shoots. One shoot from each canopy positions was detached for determination of net photosynthesis (Pn) and …
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Effects of cultivar, leaf position, and stem tissue on growth of single-leaf cuttings of Ipomoea Batatas Lam
Sweet potato single-leaf cuttings of cultivars ‘Centennial,’ ‘Jewel,’ and ‘Nemagold’ were planted in plastic pots containing steam-sterilized sand. Fully opened leaves were counted from the terminal apex on stock plant stems, and leaf positions 1 to 3 and 7 to 9 were referred to as mean leaf …
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Dynamics of vacuum-sealed, double-leaf partitions
… effectiveness of using vacuum-sealed, double-leaf partitions for applications in noise control. Substantial work has been done previously on double-leaf partitions where the acoustics of the inner chamber and mechanical vibrations of structural supports are passively and actively controlled. …
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The economic challenge of leaf gas exchange
… to plant death. In this thesis, two aspects of leaf functioning in relation to gas exchange were investigated in terms of these selection pressures, to determine whether observed leaf functioning across species could be explained in terms of broad adaptive principles, based on the exchange of …
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The economic challenge of leaf gas exchange
… to plant death. In this thesis, two aspects of leaf functioning in relation to gas exchange were investigated in terms of these selection pressures, to determine whether observed leaf functioning across species could be explained in terms of broad adaptive principles, based on the exchange of …
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Inheritance of Foliage Leaf Number in Maize
Made available in DSpace on 2014-12-04T20:16:44Z (GMT). No. of bitstreams: 1 0010516.pdf: 3953160 bytes, checksum: c8bef7d834331a12ec3734d60cb802bd (MD5) Previous issue date: 1954
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Resistance to anthracnose leaf blight in sorghum
… and soil. There are three forms of the disease: leaf blight, stalk rot, and panicle and grain rot. Anthracnose leaf blight is usually encountered 30-40 days after planting and is responsible for most of the yield loss. Common anthracnose leaf blight symptoms in sorghum include chlorotic flecks on …
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