Index Catalog // ScholarsArchive@OSU

Restoring productivity of compacted forest soils with tillage

Creator:: Whitaker, Carol Anne
Abstract:: Tillage of forest soils compacted by ground-based logging systems is a practice that is becoming widely accepted in the Pacific Northwest. However, past research has failed to adequately define the conditions and specifications that particular tillage operations should meet in order to produce the maximum growth response from planted seedlings....
Resource Type:: Masters Thesis

Effects of tillage-induced soil compaction on carrot seedlings emergence and yield

Creator:: Thomasson, James E.
Abstract:: The effects of five tillage treatments on soil bulk density and mechanical impedance were examined on Newburg sandy loam soil in the Willamette Valley, Oregon, in 1987. Subsequent effects on seedling emergence and yield of carrots (Daucus carota L., cvs. Orlando Gold and Royal Chantenay) were also measured. Mechanical impedance...
Resource Type:: Masters Thesis
Full Text:: correlation with soil mechanical impedance at 5 cm. EFFECTS OF TILLAGE-INDUCED SOIL COMPACTION ON CARROT

Tilling compacted forest soils following ground-based logging in Oregon

Creator:: Andrus, Charles W.
Abstract:: Implements for tilling compacted forest soils were tested on sites logged with ground-based machines in Oregon. The sites covered a variety of soil conditions ranging from a clay loam to a rock7 2C2 iplemeflts tested included disk harrows (four aies), brusa blades (three sites), standard subsoiler tines (two sites), wing.-...
Resource Type:: Masters Thesis
Full Text:: - tent at the time of compaction. Froehlich et al. (1980) measured increases in soil density on four

Soil compaction in central Oregon volcanic ash soils and the subsequent effects on residual ponderosa pine growth

Creator:: Parker, Robert T.
Abstract:: Although previous research in central Oregon has shown soil compaction can lead to a decline in site productivity, the subject is not understood well enough to predict the growth changes resulting from a given level of soil compaction. A study was initiated to relate the basal area, height and volume...
Resource Type:: Masters Thesis
Full Text:: degree of Master of Science in Forest Resources presented on August 24, 2000. Title: Soil Compaction in

Competitive relations for soil water in an experiment of soil compaction and organic residues in a young ponderosa pine-mixed shrub community

Creator:: Swearingen, Kurt A.
Abstract:: An experiment was established in 1992 in the central Sierra Nevada Mountains of California to assess the effects of high levels of surface organic residues, severely compacted soil, and shrub competition on the development of mixed conifer plantations. This study was conducted in 1997 to determine if selected combinations of...
Resource Type:: Masters Thesis

Response of Soil Temperature, Moisture, and Respiration Two Years Following Intensive Organic Matter and Compaction Manipulations in Oregon Cascade Forests

Creator:: Gallo, Adrian Carlos
Abstract:: Forest soils contain a substantial portion of global terrestrial carbon stores. Forest management can influence the soil carbon pool and how soil organic matter functions. The long-term productivity of forests is an ongoing goal where land managers utilize biomass and timber. A site-specific understanding of intensively managed forests can ensure...
Resource Type:: Masters Thesis
Full Text:: years to determine the effect of the treatments on soil carbon. I performed two kinds of statistical

Leaf elongation as a function of soil water potential and photoperiod

Creator:: Hodges, T.
Abstract:: Leaf elongation is a major indicator of plant growth. It is controlled by complex interactions of many factors including light intensity, photoperiod, water availability, atmospheric conditions, and plant water stress. In this study, the response of leaf elongation to length of photoperiod and to plant water stress as indicated by...
Resource Type:: Masters Thesis
Full Text:: Potential 8 Effect on Total Leaf Water Potential 8 Role of Solute Potential 8 Effect of Soil Water

Effects of lime and VA-Mycorrhiza interactions on growth responses of sweetgum seedlings

Creator:: Davis, Elizabeth Anne
Abstract:: A study, consisting of two sequential greenhouse experiments, was designed to determine the effects of soil liming upon the fungal partner in a mycorrhizal association. A Willamette Valley foothill soil, of the Jory series, was limed in increments to achieve a range of acidity and alkalinity. The P-deficiency and P-fixing...
Resource Type:: Masters Thesis
Full Text:: induce a pathogenic effect. Effects of soil tillage on mycorrhizal develpment of had not been

Effects of environmental conditions on germination and early seedling development in Agropyron spicatum

Creator:: Evenden, Angela G.
Abstract:: This research evaluated the germination and early seedling development response of two sources of bluebunch wheatgrass (Agropyron spicatum) to a wide range of environmental conditions. Seeds collected near John Day, Oregon and Secar seed obtained from the Soil Conservation Service were used in the investigations. Evaluation of the germination response...
Resource Type:: Masters Thesis
Full Text:: germinated well at 30 C and lower levels of moisture stress. The effects of several soil moisture regimes on

The effects of compaction on hydrologic properties of forest soils in the Sierra Nevada

Creator:: Cafferata, Peter Herman Louis
Abstract:: This study evaluated the effects of a crawler tractor, a rubber-tired skidder, and a torsion suspension vehicle on several soil and hydrologic properties in the western Sierra Nevada Mountains of California. Four sites, with soil textural classes ranging from a loam to a loamy sand and elevations between 680 and...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Restoring productivity of compacted forest soils with tillage

Effects of tillage-induced soil compaction on carrot seedlings emergence and yield

Tilling compacted forest soils following ground-based logging in Oregon

Soil compaction in central Oregon volcanic ash soils and the subsequent effects on residual ponderosa pine growth

Competitive relations for soil water in an experiment of soil compaction and organic residues in a young ponderosa pine-mixed shrub community

Response of Soil Temperature, Moisture, and Respiration Two Years Following Intensive Organic Matter and Compaction Manipulations in Oregon Cascade Forests

Leaf elongation as a function of soil water potential and photoperiod

Effects of lime and VA-Mycorrhiza interactions on growth responses of sweetgum seedlings

Effects of environmental conditions on germination and early seedling development in Agropyron spicatum

The effects of compaction on hydrologic properties of forest soils in the Sierra Nevada

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