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 130 for “"seed production"”.
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A Financial Costing Model for Onion Seed Production
This study aims to help onion seed producers through the development of a financial cost-planning tool. This tool will help producers to make strategic financial decisions about adopting their own onion seed enterprise. This model provides a clearer understanding of how the physical production …
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SEED PRODUCTION OF MIXED PRAIRIE IN GRASSLANDS NATIONAL PARK, SASKATCHEWAN
Native grassland is a potential source of seed for revegetation and restoration of ecosystems. Dynamics of community seed production within and between growing seasons has not been studied in the northern mixed prairie. The objectives of this research were (1) to determine seasonal trends in seed …
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Belowground impacts of regenerative agriculture in a South African seed production system
… conventional agriculture within a cauliflower seed production system in the Western Cape of South Africa. Specifically, this study investigated the effects of different management strategies on soil fauna and the important soil processes they govern. The treatments included “conventional …
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Comparisons of tilapia seed production under various broodstock densities and fry stocking densities
Four methods of seed (eggs, sac-fry, and fry) production for Rocky Mt. White hybrid® tilapia, (0. niloticus x O. aureus), were compared under green water conditions over a six month period in an environmentally controlled greenhouse at the Virginia Polytechnic Institute and State University's …
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Effect of glyphosate on common cocklebur, velvetleaf, and common waterhemp seed production, viability, germination, and dormancy
… randomized complete block split-plot design. The seed of weeds surviving treatments were collected and analyzed to determine glyphosate effects on seed production, viability, germination, and dormancy. Glyphosate rates had a significant effect on soybean yield, weed control, and weed growth while …
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A waterhemp saga: Seed production, genetics, hybridization, and the creation and discovery of quad-stack individuals
… required for female plants to produce mature seeds after pollination. It was found that some seeds may become viable in as little as 7–9 days after pollination, and that seed dormancy drops if seeds remain on the plant for at least 15–30 days after pollination. These findings could be helpful …
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Forage Adaptability Trials for Forage and Seed Production in Bolivia; Effect of 5 Herbicides on 7 Native Utah Forbs
… livestock, and that could also produce enough seed to distribute to farmers. While some of the grasses produced reasonable amounts of biomass, none produced seed in quantities that would be even close to being economically viable. The most likely cause of this is that the timing of resources …
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Soybean Mosaic Virus Hc-Pro Enhances Viral Symptoms, Bean Pod Mottle Virus and Transgene RNA Stability, siRNA Accumulation, and Reduces Soybean Seed Production
… altered unifoliate leaf morphologies and reduced seed production. When inoculated with three SMV strains, the severity of initial symptoms was directly related to the levels of HC-Pro mRNA accumulation in the transgenic plants. i.e, plants expressing the lowest level of HC-Pro mRNA showed mild …
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A tale of two grasses: Seed production has small & potentially positive effects on seed & seedling traits of squirreltail grasses, but Thurber’s needlegrass resists farming
Native seed is increasingly farmed to meet the growing demands of seed-basedrestoration. One concern is that farm environments are expected to alter wild collections, leading to phenotypic changes that may hinder establishment. Focusing on two native perennial grasses in the western United States, …
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Assessing chemical control options and their effects on lesser clover leaf weevil, red clover pollinators and evaluating red clover seeding rates for optimal seed production and N fixation in Saskatchewan, Canada
Red clover (Trifolium pratense L.) seed production in Saskatchewan is complicated by a series of agronomic and pest management issues. These include damage from the lesser clover leaf weevil (Hypera nigrirostris F.; LCLW), insecticide toxicity to bee community and unidentified optimal red clover …
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Impact of Rhinocyllus conicus Froelich (Coleoptera:Curculioniadae) on the reproduction of Carduus thistles in Virginia
Musk thistle (Carduus nutans) seed production from early developing (terminal and first lateral) heads was reduced by 10% in 1973 and 75% in 1974 due to larval feeding of Rhinocyllus conicus. This was caused by heavy infestation of the early heads (45% in 1973, 70% in 1974) with a subsequent 5-fold …
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PHENOLOGICAL STUDIES OF THREE NATURAL STANDS OF JOJOBA (SIMMONDSIA CHINENSIS (LINK) SCHNEIDER) NEAR TUCSON, ARIZONA.
… factors and to study its regularity of production. Phenological studies including vegetative growth, floral biology, seed production, and seed wax content were conducted from 1979 to 1982, complementing investigations in 1978 in three natural stands of jojoba, near Tucson, Arizona and …
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Regulation of reproductive success in the biennial plant, Hydrophyllum appendiculatum
… (1987-1989) revealed that survival, flower production, and seed production varied spatially and temporally. While some of this variance was probably due to rainfall patterns, seed production was negatively affected by an unidentified pathogen and a weevil that consumed flowers and developing …
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