Index Catalog // ScholarsArchive@OSU

Winter cover cropping effects on integrative biological indicators of soil quality

Creator:: Ndiaye, Evelyne L.
Abstract:: Responses of biological indicators of soil quality to winter cover cropping were measured on soil samples collected from 6 commercial growers' fields and two experiment research stations in the Willamette Valley of Oregon. The research stations were the North Willamette Research and Extension Center (Aurora, OR), and the Oregon State...
Resource Type:: Masters Thesis
Full Text:: , Victoria, Australia. Wyland, L.J., L.E. Jackson, and K.F. Schulbach. 1995. Soil-plant dynamics following

Weathering rate, nutrient supply, and denudation in forested watersheds, southwestern Idaho batholith

Creator:: Clayton, James L. (James Lindow), 1942-
Abstract:: Biogeochemical data from four small watersheds in the Silver Creek study area, southwestern Idaho, provide the basis for: 1. An estimate of chemical and erosional denudation rates (CD and ED), 2. an estimate of plagioclase weathering rate, 3. a rational basis for estimating the rate of nutrient supply to soil...
Resource Type:: Dissertation
Full Text:: ), typical of a large portion of the main inner facies of the batholith (Ross, 1963). This rock contains

The nature and properties of amorphous colloids formed from Mazama tephra

Creator:: Dingus, Delmar DeLee
Abstract:: Soil samples from the Mazama tephra deposit were collected from the AC and C2 horizons at five different locations along the axis of the main depositional lobe. The clay fraction from the samples was recovered and studied by means of chemical, x-ray, DTA and electron microscopy methods in order to...
Resource Type:: Dissertation
Full Text:: dissolution in boiling 0.5 N NaOH (Jackson, 1956; Dudas and Harward, 1971). The method greatly improves x-ray

The influence of phosphatase-producing bacteria on phosphatase activity and available phosphorus in soil

Creator:: Nelson, Sheila J.
Resource Type:: Masters Thesis
Full Text:: cleaving the phosphate ester bonds of these molecules to release P, (Speir and Ross, 1978). Plant roots

The effects of the Mazama tephra-falls : a geoarchaeological approach

Creator:: Matz, Stephan E.
Abstract:: About 7,000 years ago two major tephra-falls blanketed the Pacific Northwest in volcanic ash. These two tephra-falls, identified as the Llao and climatic tephra-falls, were a part of the eruptive events that led up to the collapse of Mount Mazama to form Crater Lake in the southern Oregon Cascades. The...
Resource Type:: Masters Thesis

Temperature and water potential effects on physiological functions of sudangrass (Sorghum vulgare var. Piper)

Creator:: Young, Richard Su-Shung
Abstract:: Temperature and water potential effects on the growth, transpiration, total nonstructural carbohydrate (TNC) content, and nutrient uptake of sudangrass (Sorghum vulgare var. piper) were investigated in laboratory experiments. The effect of nitrogen supply on the growth and nutrient uptake at constant soil water potential was also investigated in this study....
Resource Type:: Dissertation
Full Text:: to 20 C. No appreciable differences were noted later in the growth cycle. Salisbury and Ross (1969

Some effects of sulfur fertilization on the nutrient value of subclover-grass forage

Creator:: McCarthy, Michael J.
Abstract:: Pastures consisting of mixtures of subclover (Trifolium subterraneum) and grasses have responded to sulfur fertilization on many sites in Douglas County, Oregon. The objectives of this study were to examine specific changes in forage quality which occur as sulfur is applied in excess of the amount required for maximum yield...
Resource Type:: Masters Thesis
Full Text:: Gardner for his advice, guidance, friendship and countless hours of assistance. To Dr. Tom Jackson for

Soil Development and Organic Carbon Stocks Across a Lithosequence in the Perhumid Coastal Temperate Rainforests of Southeast Alaska

Creator:: Fedenko, Jennifer M.
Abstract:: The perhumid coastal temperate rainforests of southeast Alaska contain an abundance of soil organic carbon (SOC) that has accumulated in a wet, cool climate where forest fire disturbance is minimal and organic matter decomposition rates are low. Coastal temperate rainforests are supported by carbon-rich soils that provide ecosystem services including...
Resource Type:: Masters Thesis
Full Text:: Pg up to 300 cm depth in the soil profile (Jobbágy and Jackson, 2000) whereas the atmospheric

Response of Soil Microbially Mediated Nutrient Cycling and Community Structure to Timber Harvest in the Pacific Northwest

Creator:: Danielson, Rachel E.
Abstract:: Forest harvest persists as one of the most globally important industries, and crucially provides raw wood products for both building and fuel materials. Mechanistically complex abiotic and biotic processes curb ecosystem recovery following timber harvest and it is of great importance to understand the effects of this practice on biogeochemical...
Resource Type:: Masters Thesis
Full Text:: , S.L., Canadell, J.G., Ciais, P., Jackson, R.B., Pacala, S.W., McGuire, A.D., Piao, S., Rautiainen, A

Response of soil microbial communities and nitrogen cycling processes to changes in vegetation inputs

Creator:: Brewer, Elizabeth Ann
Abstract:: Changes in the type and amount of plant inputs can occur gradually, as with succession, or rapidly, as with harvesting or wildfire. With global change it is anticipated that both gradual and immediate scenarios will occur at increasing frequency. Changes in vegetation inputs alter the quality and quantity of soil...
Resource Type:: Dissertation
Full Text:: ; Hollister et al., 2010; Waldrop and Firestone, 2006) and C and N cycling (Hughes et al., 2006; Jackson et

ScholarsArchive@OSU

Winter cover cropping effects on integrative biological indicators of soil quality

Weathering rate, nutrient supply, and denudation in forested watersheds, southwestern Idaho batholith

The nature and properties of amorphous colloids formed from Mazama tephra

The influence of phosphatase-producing bacteria on phosphatase activity and available phosphorus in soil

The effects of the Mazama tephra-falls : a geoarchaeological approach

Temperature and water potential effects on physiological functions of sudangrass (Sorghum vulgare var. Piper)

Some effects of sulfur fertilization on the nutrient value of subclover-grass forage

Soil Development and Organic Carbon Stocks Across a Lithosequence in the Perhumid Coastal Temperate Rainforests of Southeast Alaska

Response of Soil Microbially Mediated Nutrient Cycling and Community Structure to Timber Harvest in the Pacific Northwest

Response of soil microbial communities and nitrogen cycling processes to changes in vegetation inputs

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