Thesis (M.S.)--Oklahoma State University, 2010. / Vita. Includes bibliographical references.

Thesis (M.S.)--Oklahoma State University, 2010. / Vita. Includes bibliographical references.

Thesis (M.S.)--Oklahoma State University, 2010. / Vita. Includes bibliographical references.

Thesis (doctoral)--Åbo akademi, 1789. / Reproduction of original from Kress Library of Business and Economics, Harvard University. Goldsmiths'-Kress no. 13814.6-1.

Thesis (M. S.)--Oklahoma State University, 2005. / Vita. Includes bibliographical references.

Thesis (Ph.D.)--Oklahoma State University, 2009. / Vita. Includes bibliographical references.

<p> Day-neutral strawberry cultivars have produced competitive yields and allowed for extended production in several recent experiments in the Upper Midwest and northeastern US, and the inclusion of small plastic-covered low tunnels has increased percent marketable yields and even total yields in some cases. However, low tunnel systems have not been evaluated for production conditions in New England, and cultivar evaluation is limited. The objectives of our experiments were to: (1) evaluate five different plastic films with diverse light-transmission profiles, as well as three mulch types (black plastic, white-on-black plastic, and bare ground) for low tunnel day-neutral strawberry production in New England, and (2) compare the performance of six standard day-neutral cultivars for their suitability at our location (&lsquo;Albion&rsquo;, &lsquo;Aromas&rsquo;, &lsquo;Monterey&rsquo;, &lsquo;Portola&rsquo;, &lsquo;San Andreas&rsquo;, and &lsquo;Seascape&rsquo;). We report that during the 2016 and 2017 growing seasons in Durham, New Hampshire, season-long cumulative marketable yields were comparable between plants under tunnels than open beds. However, yields were often increased under low tunnels during the late fall months compared with open bed production. Furthermore, unmarketable yields were significantly lower under low tunnels than open beds, increasing the percentage of marketable yield from &ap;70% on open beds, to &ap;80-85% under low tunnels (depending on low tunnel film and cultivar).Marketable yields were greater in 2017 than 2016, averaging 483.3 and 380.1 g/plant, respectively, and also higher on plastic mulched beds than unmulched beds, but did not differ between black and white plastic mulch. However, runner emergence was significantly reduced on white mulch and unmulched beds compared with black mulch, except for in 2016, when runner emergence on black plastic under low tunnels was comparable to white mulch and unmulched beds. </p><p> In the evaluation of multiple cultivars on black mulch only, season-long total marketable yields of &lsquo;Albion&rsquo;, &lsquo;Aromas&rsquo;, and &lsquo;Monterey&rsquo; were comparable, ranging from 355.0 to 389.1 g/plant. &lsquo;Portola&rsquo; (254.8 g/plant) and &lsquo;Seascape&rsquo; (285.3 g/plant) were the lowest yielding cultivars, significantly lower than &lsquo;Albion&rsquo; and &lsquo;Monterey&rsquo;. &lsquo;San Andreas&rsquo; was intermediate in yield (289.4 g/plant), lower than &lsquo;Albion&rsquo;, but comparable to other cultivars. Marketable fruit weight was also lower for &lsquo;Portola&rsquo; and &lsquo;Seascape&rsquo; than all other cultivars. Runner emergence was largely dictated by cultivar, and low tunnels significantly reduced runner emergence for &lsquo;Aromas&rsquo;, &lsquo;Monterey&rsquo;, and &lsquo;San Andreas&rsquo;, and in one of two years, for &lsquo;Albion&rsquo; on black plastic mulch. At a plant density of 13,068 plants/acre and an average &lsquo;Albion&rsquo; yield of 12,937 lbs/acre, we estimate net revenue would range from $22,517 ($2.90/lb) to $43,215 ($4.50/lb) per acre under open field conditions.</p><p>

<p>Food is crucial for all life on the planet, however food security is a problem in many parts of the world (Van Straaten, 2006). In the last decade the number of undernourished grew to 1.02 billion (FAO, 2009). Shapouri et al. (2010) estimates by 2020 food insecurity will reach 500 million in SSA. In a world with limited resources, the only solution to meet food demand is by maximizing yield per unit of land (Van Straaten, 2006). Large-scale intensive farming is widely practiced in the US as a solution to this growing problem (Fyfe et al., 2006). Current food production practices are driven by mass production, which is highlighted by large inputs including pesticides, fertilizers, and irrigation. Although these techniques have revolutionized agriculture and helped combat world hunger, ill effects have been reported such as soil degradation and loss of biodiversity (Tilman et al., 2002). Alternative techniques can be introduced which increase plant production and are environmentally friendly, less costly, and less intensive (Theodoro & Leonardos, 2006). Two of these methods are magnetic fields and radiation (Aladjadjiyan, 2012). Magnetic fields were confirmed to affect plant growth, germination, metabolism, and vigor (Celik et al., 2009; Zuniga et al., 2016). Literature suggests pyramidal shapes harness the magnetic field of the earth to generate para magnetism within their structure (Van Doorne, 2013). Although pyramids have produced documented improvements in plant growth and germination (Kumar et al., 2010), the use of pyramids to incubate seeds before planting has not been tested. The purpose of this research was to describe the impacts of pre-sowing incubation within a pyramid on germination characteristics, seedling growth, seed desiccation, and soil condition, as well as describe any relationships existing between independent and dependent variables. Both wooden and copper pyramids were used, and seeds were incubated for periods of 5, 10, 35, and 45 days. A total of 1,800 seeds were tested. Data were analyzed in SPSS using one-way ANOVA?s at p<.05 significance level. Pyramids negatively affected germination frequency, percentage, time, and rate, but positively affected uniformity (synchrony, uncertainty, variation of germination time). Conclusions indicate longer incubation periods are beneficial for germination and uniformity, while shorter incubation periods increased vegetative growth. Copper pyramids exceled over wooden pyramids when examining seedling growth. Copper pyramids paired with longer incubation periods saw the highest increase in seed weight. The highest average soil temperature was recorded in the wooden pyramid, and soil pH remained unchanged.

No description available.

The many medicinal, nutritional, industrial, and agricultural uses of moringa are well documented, although studies remain focused on moringa as a wild, uncultivated plant and little horticultural research has been devoted to its culture. Greenhouse experiments were conducted at the State University of New York at Cobleskill, New York, USA during the summer of 2006. Soilless culture has been investigated as an alternative production system for medicinal and aromatic plants, and moringa seedlings were grown using hydroponic and aeroponic culture at a pH of 5.5-6.0 and electrical conductivity levels of 2.0-2.3 dS˙m-1 in order to maximize leaf biomass production and gain access to root biomass. Moringa leaves are valued for their human nutritional benefits and as a livestock feed, however the monopodial growth habit of moringa requires removal of the terminal growing point in order to encourage branching and maximize leaf production. Seedlings are often subjected to extreme levels of vegetative harvest when grown in high-density agroforestry production systems, often resulting in high levels of mortality. Seedling decapitation induced outgrowth of lateral buds, and no lateral buds were released by intact plants that were not decapitated. The release from apical dominance was repressible by the application of exogenous auxin (0.5% IAA) to the stumps of decapitated seedlings. Seedlings decapitated to node 6 (15 cm, counted acropetally) released buds more quickly and produced three times the dry weight per plant than seedlings decapitated to node 1 (5 cm). Seedlings decapitated to 30 cm (approximately 12 nodes) released 2 more buds per plant and twice the dry weight compared to those decapitated to 40 cm (approximately 16 nodes). Pinching seedlings to remove 5 or 10 cm of apical stem resulted in little regrowth with few buds released and low dry weights. The percentage of stem removed was more important than the actual height to which a seedling was decapitated in order to maximize regrowth. Twice-decapitated plants released more buds (6.7/plant) than once-decapitated plants (2.7/plant), demonstrating enhanced lateral bud response of previously decapitated seedlings. The effect of four different pruning strategies on leaf biomass production of young, pollarded moringa trees was also examined.