2,386 research outputs found

    Texas Forestry Paper No. 19

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    Ad valorem taxes on timberland in northeast texashttps://scholarworks.sfasu.edu/texas_forestry_papers/1027/thumbnail.jp

    Effects of Ponderosa Pine Ecological Restoration on Forest Soils and Understory Vegetation in Northern Arizona

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    The human exclusion of wildfire and overgrazing by livestock since settlement have caused dramatic changes in ponderosa pine (Pinus ponderosa Dougl ex Laws) forest ecosystems. These changes include increased numbers of tree stems, reduced understory cover and diversity, and the introduction of invasive, non-native understory species. This study evaluated the coverage and species composition of understory vegetation present in the “cool-season” (late spring and early summer) in a ponderosa pine forest on grazed and ungrazed plots that had undergone restoration treatments on three different soil/geologic parent material types near Flagstaff, Arizona, twelve years after tree thinning and grazing exclosure treatments were applied. Several measured soil properties, such as soil respiration and temperature, were also evaluated in this study. Species richness of “cool-season” vegetation was influenced more by grazing practices than restoration treatments. Differences could be less or greater when vegetation that is active later in the season is measured. Vegetative cover was significantly influenced by restoration treatments (9.3% cover under open canopies and 6.5% under dense canopies), probably due to differences in competition for light and other resources (i.e. soil moisture and nutrients). Unlike finding by Abella et al. (2015), who studied “warm-season” vegetation, “cool-season” understory cover was not influenced by soil parent material type in this study, which might suggest that differences in understory cover due to soil properties are only seen shortly after restoration treatments are applied, or the time of year vegetation is evaluated may play a role in the differences seen. Soil respiration was highest on limestone soil parent material type (3.3 g C-CO2 m-2 day-1), and soil temperature was lowest under closed canopy treatments (15°C)

    April First Constitution and Bylaws

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    April First Constitution and Bylaws from 1983 for Little Creek Academy

    Effecting Change at Syracuse University: The Importance of Values, Mission, and Vision

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    Change comes slowly in higher education, where, it seems, colleges and universities operate by the priniciple that nothing new should happen for the first time. Nevertheless, significant change has become the norm on campuses across the nation. As these institutions adapt, they will do well to be guided by core values, clear missions, and a vision for the future. Syracuse University is one of many following such a path to the twenty-first century

    Chancellor\u27s message

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    Labor requirements, irrigated crops 1947: labor requirements for producing sugar beets, potatoes, barley, and beans under irrigation, Weld County, 1947

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    June, 1948.Includes bibliographical references (pages 96-97).To view the abstract, please see the full text of the document

    Chemistry of the [beta]-phenylserines

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    The economic feasibility of rural recycling : a case study approach

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    Rural community decision makers have come under increased pressure to deal with solid waste disposal in a cost effective and acceptable manner. As siting of new landfills has become more difficult due to environmental restrictions and public opposition, alternative disposal methods have received increased attention. Recycling can be viewed as a way to divert materials from the solid waste stream to be landfilled, as well as providing other benefits. While some research has been done on rural solid waste collection and landfill disposal systems, very little attention has been given to the potential for rural recycling. Rural recycling has generally been viewed as impractical due to relatively small supplies of materials and large distances to industry markets. This research was designed to assess the economic feasibility of rural recycling by analyzing three case study recycling operations, one each in Alabama, North Carolina, and Tennessee. Economic feasibility, defined as breaking even when only sales revenues from recyclable materials and full operating costs are considered, would be very difficult to achieve for communities the size of those studied, given the market prices present during the study period. However, from a local accounting stance, outside funding sources, such as grants provided by the Tennessee Valley Authority for equipment or special local and state subsidies for labor, helped to reduce net costs of operation for each center. In addition, each center generated considerable landfill cost savings by diverting recyclable materials out of the solid waste stream. When these cost savings were taken into account, net costs of operation were greatly reduced. In fact, in the case of one center, landfill cost savings more than offset net operating costs. The need to site new landfills was also delayed, thereby postponing the political or protest costs generally associated with landfill siting efforts. Other local benefits included supplemental income for residents and improved aesthetics from reduced litter. The quantity of recyclable materials collected plays a key role in influencing economic feasibility. Analyses of each center demonstrated the potential for substantial economies of size within their existing scales. The net cost per ton of recycled material processed was also reduced as the quantity collected increased and more efficient large scale equipment was introduced. From statistical analyses and personal surveys of those responsible for managing or overseeing each center, it could be concluded that several factors were critical in influencing the volume of material collected. These included education of local residents and publicity about recycling activities, prices offered for materials, the variety of materials accepted, and the accessibility of the center. While economic feasibility in a strict sense may be difficult to achieve for rural recycling centers, the continued operation of the three centers studied here for over four years suggests they have achieved feasibility in a broader sense, given the availability of outside funding and the indirect benefits generated. Local political and com munity support has been important to the success of these centers from the time of their establishment up to the present
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