Thesis (Ph. D. - Plant Sciences)--University of Arizona, 1983. / Includes bibliographical references (leaves 381-401).

No description available.

Thesis (Ph. D.)--Washington State University, May 2007. / Includes bibliographical references.

Thesis (M.S.)--University of Wisconsin--Madison, 1963. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 82-94).

In this study, plant sales records for a 12-month period ending in 1968 from five British Columbia Lower Mainland nurseries were compiled for analysis of quantities sold of each species, their cash value and nursery size, and the types of customers to whom plants were sold. Landscape projects designed by three Vanouver landscape architects over a two-year period, 1967 - 1968, were studied to learn how plants were being used, and what quantities and species were required for 10 types of landscape situations and six geographic locations. Plants were listed according to quantities sold or specified to show species which were being used in large amounts. Computerized methods of data collecting were employed to test methods of conducting a continuing inventory of plant material requirements and supplies. Sales data from five nurseries were compared to British Columbia Department of Agriculture totals for a similar period of time 1966-1967. On the basis of acreage, the sample was estimated to be 37.8% of the total nursery production for Lower Mainland British Columbia. The projected sample data were comparable to government figures in most plant catagories except for estimates of total sales of roses, rhododendrons and azaleas. This suggests that nurseries specializing in roses, or rhododendrons and azaleas sell a large proportion of these plants. Plants were shipped from the nurseries studied to many types of customers. In the sample it was found that 58.9% of the value of sales were made to purchasers within the immediate area. Shipments to the Prairie Provinces constituted the largest percentage of the value of plants sold outside the Lower Mainland, 13.6% of total value. Large growers within the Lower Mainland purchased a larger proportion of plants sold than any other type of customer, 17.9% of total value. This figure shows the extent of specialization and interdependence of the industry. It also indicates that survey figures based on nursery sales do not give a true estimate of production, as perhaps 20% to 25% of the value of sales represent plants traded within the industry two or more times. Retailers, landscape contractors and large growers in the sample purchased plant material of nearly equal value. The garden centre type of operation appeared to be the major retail outlet purchasing nursery plants from growers, rather than the chain or department store. Distribution figures determined in this survey, however, can only be a small indication of the total picture, since the nurseries tend to be a highly variable group. Data collected from landscape architects' planting plans was analysed in a number of ways: First, plant species were ranked in order of quantities used over a two-year period. Second, the quantities of plants specified for 10 types of landscape projects and for six geographic locations were listed, and the average number of plants used for each type of landscape development was calculated. Third, The frequency of use of various plant species and cultivars was examined. Plants used frequently by three landscape architects were listed, and also plants used by two of the three designers, or by only one designer. It is apparent that the landscape architects made frequent use of a comparatively short list of plants, and that a few species were specified in large quantities for mass-planting effects. Broadleaved evergreens and ground covers were the two plant categories favoured by the landscape architects; quantities specified annually made up a large part of the total Lower Mainland production of these plants, 58.7% and 69.1% respectively. In comparison, the quantities of conifers and trees used by landscape architects was very low, only 5.3% and 2.6% of estimated Lower Mainland production. Most of the plants used in great quantities were specified by all three designers studied, although it was shown that one landscape architect alone can create a big demand for a particular plant when he uses a favourite species frequently. Ways were suggested in which growers and landscape architects may cooperate to introduce new types of landscape plants to the short list of frequently-used species. / Land and Food Systems, Faculty of / Graduate

The effect of water stress on the growth, landscape performance, and plant-water relations of four ornamental ground cover species (gray santolina, Santolina chamaecyparissus; dwarf rosemary, Rosemarinus officinalis; Chihuahuan Desert lantana, Lantana velutina; and prostrate germander, Teucrium chamaedrys) was investigated for a twoyear period. Plants were established in a drip irrigated field and subjected to four soil moisture regimes (-1, -5, -10, and -15 bars), monitored by neutron probe. While water stress reduced vegetative covers, shoot growths, heights, and fresh and dry weights of the plants, species response to water deficit varied greatly. Minimum amounts of water required for growing each species were determined. Germander was found to be the most drought tolerant, followed by santolina, rosemary, and lantana in decreasing order. In earlier treatment period, adequately watered plants showed better aesthetic appeal and landscape performance than the plants grown under a high soil moisture tension. However, the effect of water stress on plants' landscape performance was less evident as plants became more established. In all species tested, with an exception of germander, leaf water, osmotic, and turgor potentials of nonstressed plants were higher than those of severely stressed plants. Using the pressure-volume technique, apoplastic water was found to contribute a significant proportion of the total tissue water content. The dilution of symplastic water by apoplastic water during osmotic potential determinations was found to be the major cause of the frequently observed negative turgidity. Methods for correcting for these apoplastic dilution effects were suggested. Osmotic potentials at full and zero turgor, symplastic water contents, changes in water, osmotic, and turgor potentials relative to changes in cell water content (Blifler diagrams), and cell wall elasticity varied significantly with species and treatments. Water stress caused a reduction in total chlorophyll and carotenoids concentrations and in the chlorophyll/ carotenoids ratio, without changing chlorophyll a/chlorophyll b ratio in plant tissues. Leaf reflectances to incident light as measured at 400 to 700 nm were found to differ substantially by species but not by treatments. No consistent correlations were found to exist between leaf pigment content and each of dominant wavelength, brightness, and the purity of leaf color.

As its title implies, this work concerns an examination of extensive ornamental gardening at three notable Highland estates. The Introduction sets the context for extensive gardening in Scotland by highlighting some eighteenth century perceptions of the 'English Garden' in Britain and in Europe before considering what, for some sections of the aristocracy, may well have been an acceptable approach to laying-out grounds in Scotland during the early part of the century. The first chapter outlines the contribution made by notable Scots to an age remembered for its significant advances in agriculture, architecture and the related arts. Chapter Two records the development of the grounds and gardens at Inveraray from the 1720's until the time of the third Duke of Argyll. The third and fourth chapters examine the development of the second Duke of Atholl's pleasure grounds at Blair and Dunkeld. Chapter Five outlines the evolution of the gardens and grounds at Taymouth from about 1720 until the later years of the third Earl of Breadalbane. The Epilogue provides a brief summary of the gardening achievements of these magnates and records the unexpected significance of exotic expression in their garden art.

Call number: LD2668 .T4 1978 B45 / Master of Landscape Architecture

M.Sc. (Botany) / Please refer to full text to view abstract

The primary purpose of this thesis was to examine short run supply aspects of British Columbian (EB.CC..)) ornamental nursery stock propagation and trade. To this end, spatial equilibrium analysis was utilized in studying the influences of Canadian plant protection regulations, transportation costs, and costs of production on United States (U.S.) import levels into the province as well as domestic production levels. ;The basic constructs of the spatial equilibrium analysis were the transportation model and the production-distribution model. These models were used in establishing interregional and international production and trade patterns with respect to B.C. They relate to selected ornamental varieties under specified efficiency criteria and various parameters, with reference to the 1973 calendar year. In addition, sensitivity analysis was conducted within the spatial equilibrium framework. This indicated the strength of the competitive position of domestic propagators vis-a-vis U.S. propagators and provided an insight into the future state of health of the B.C. industry. Finally, an examination of domestic propagation levels was undertaken via quantitative and qualitative analyses in an attempt to explain the residual U.S. import quantities into B.C. For the purpose of this study eight distinct geographical regions were identified. Each region contained a representative point of origin or destination. Seven of these regions were specified as production or supply regions, comprised of four domestic production regions and three U.S. production regions. Five of the eight regions were identified as consumption or demand regions, comprised of four B.C. consumption regions and one Prairie consumption region. Three nursery conifers, Juniperus chinensis 'Pfitzeriana Aurea, ' Thuja occidentalis Pyrdmidalis' and Pinus mugho mughus were selected as being representative ornamental plant materials for the purpose of this study. The results of this study show that in 1973, B.C. propagators of the specified nursery materials had a competitive advantage in supplying domestic consumption regions. But this competitive advantage was reduced to some extent by the existence of Canadian plant protection regulations. This had the effect of both directly and indirectly inducing movement of materials from the U.S. in greater quantities than would have been the case without regulations. This study further shows that the competitive advantage of domestic propagators over U.S. growers was tenuous. Assuming 1975 transportation rates, a 10 percent increase in domestic costs of production, and constant U.S. procurement costs, would lead to the competitive advantage being shifted to U.S. suppliers for some ornamental materials. In addition the study discovers nothing to indicate that domestic propagation levels were unduly constrained by resource limitations. The results suggest that rapid domestic consumption increases coupled with grower uncertainty regarding legislative constraints and certain 'externalities' enjoyed by U.S. propagators, accounted for greater import levels than would have been expected a priori. It is believed that the findings of this analysis can be extended to other ornamental plant materials involved in B.C. propagation, insofar as they are produced and sold in part or entirely under similar conditions to those dealt with in the study. / Land and Food Systems, Faculty of / Graduate