Index Catalog // ScholarsArchive@OSU

Mt. St. Helens ash : considerations of its fallout on rangelands

Creator:: Sneva, Forrest, Britton, Carlton M., Mayland, H. F., Buckhouse, John, Evans, Raymond A., Young, James A., and Vavra, Martin
Abstract:: Field and laboratory studies were conducted on volcanic ash from Yakima, Moses Lake, Spokane, Washington, and Moscow, Idaho, three weeks after the May 18, 1980, eruption of Mt. St. Helens in southwestern Washington. These studies examined 1) the chemical, physical, and water retentivity properties of the ash, 2) the effect...
Resource Type:: Technical Report
Full Text:: effects of the ash over the long term, both on individual native plants and the native and seeded plant

Survival of natural and planted seedlings under a shelterwood in southwest Oregon

Creator:: Helgerson, O. T., Wearstler, Kenneth A., Bruckner, Werner K., and Oregon State University. Forest Research Laboratory
Abstract:: The effects of naturally shaded microsites on survival and height growth of natural and planted seedlings were evaluated after an initial shelterwood harvest in the eastern Siskiyou Mountains of southwestern Oregon. After 2 years, the probabilities of survival for planted Douglas-fir (84 percent) and ponderosa pine (56 percent) were significantly...
Resource Type:: Technical Report
Full Text:: shading had no effect on the survival of planted conifer seedlings (Strothman 1972). In the spring of 1979

Performance of artificially shaded container-grown Douglas-fir seedlings on skeletal soils

Creator:: Hobbs, Stephen D. and Oregon State University. Forest Research Laboratory
Abstract:: One-year-old container-grown Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] seedlings were outplanted on north, east, south, and west aspects on steep, skeletal Xerochrepts in southwest Oregon. After 2 years, survival rates were highest on north and south aspects, but biomass production (dry weight) was greatest on the west aspect. Shadecards, used to...
Resource Type:: Technical Report
Full Text:: , and limited moisture supply combine to form the primary cause of seedling mortality, especially on

Glyphosate and hexazinone mixtures : effects on weeds and Douglas-fir transplants

Creator:: White, Diane E., Newton, Michael, 1932-, and Oregon State University. Forest Research Laboratory
Resource Type:: Technical Report
Full Text:: of the two herbicides; that is, the effect of the hexa- ment -- by estimating the percentages of the

Damage to regeneration during shelterwood overstory removal on steep terrain : a case study

Creator:: Tesch, Steven D. and Oregon State University. Forest Research Laboratory
Resource Type:: Technical Report
Full Text:: . Furthermore, the layout of skyline corridors can have an effect on the amount of site disturbance and seedling

Effect of temperature on nutritional requirements of plants

Creator:: Ungs, M. J. (Michael J.), Boersma, L., and Suntaree Akratanakul
Abstract:: Published April 1982. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: SlOB )L/) Effect of Temperature on Nutritional

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:: soil. 26 27 The effect of upper tine geometry on draft for sev- eral subsoiler designs was

Response of Artemisia tridentata ssp. wyomingensis and Stipa thurberiana to nitrogen amendments

Creator:: Wang, Chien-kuo
Abstract:: The effect of nitrogen on influencing the competitive balance between a shrub, Artemisia tridentata ssp. wyolningensis (ARTRW) and a perennial grass Stipa thurberiana (STTH) in a sagebrush steppe community was determined. Nitrogen levels were altered on 5x5 in plots by applying 4.5 gun2 of nitrogen in the form of ammonium...
Resource Type:: Masters Thesis

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

Survival and some physiological aspects of tissue cultured cells from Douglas-fir (Pseudotsuga menziesii Mirb. (Franco)) and a poplar hybrid after freezing to liquid nitrogen temperature

Creator:: Binder, Wolfgang Dieter
Abstract:: Cell aggregate size in both Douglas-fir and poplar suspension cultures was reduced by the addition of the chelator compounds EDTA and CDTA at concentrations under 100 ppm. Reduced cell aggregate size increased growth efficiency of suspension cultures of both species. Cell aggregates 550 j.z. or smaller in size were used...
Resource Type:: Dissertation

Relationships of tree growth to nitrogen and water availability in a sheep-tree-pasture system in Douglas County, Oregon : field case study and shadehouse simulation

Creator:: DeMeo, Thomas
Abstract:: This thesis consists of three parts: 1) a field case study involving tree growth, moisture stress, and foliar nitrogen response to sheep-grazed pasture treatments; 2) a shadehouse (potted-plant) study of simulated grazing effects on tree growth and moisture use; and 3) a summary, synthesizing results of the field and shadehouse...
Resource Type:: Masters Thesis

Germination and first-year survival of red alder seedlings in the central Coast Range of Oregon

Creator:: Haeussler, Sybille
Abstract:: The role of disturbance in seed germination and first-year survival of red alder (Alnus rubra) was studied over two growing seasons at four sites representing a climatic gradient within the central Coast Range of Oregon. Disturbance affected red alder seed germination and seedling establishment by altering the temperature and moisture...
Resource Type:: Masters Thesis

Effects of nutrient and light limitation on mountain hemlock : susceptibility to laminated root rot

Creator:: Matson, P. A. (Pamela A.)
Abstract:: Mountain hemlock forests in the Oregon Cascades exhibit wave-form dieback resulting from infection by laminated root rot (Phellinus weirii). Although Phellinus remains viable in dead roots after the wave of dieback passes, many regenerating mountain hemlock forests do not become immediately reinfected. We measured at least a doubling of nitrogen...
Resource Type:: Dissertation

The effect of light intensity on Douglas-fir foliage quality : survival and development of Western spruce budworm

Creator:: Waddell, Karen L.
Abstract:: Foliage from Douglas-fir(var. glauca) seedlings grown under two light intensities was bioassayed to examine palatability to the western spruce budworm (Choristoneura occidentalis Free.). Samples were collected in Fall, Winter and early Spring to identify seasonal changes in host foliage, as evidenced by the response of spruce budworms. Fall collected foliage...
Resource Type:: Masters Thesis

Detection of 2,4-D herbicide damage using ground-based measurements : implications for remote sensing

Creator:: McCreight, Richard W.
Abstract:: Spectral patterns of three brush species under the influence of herbicide treatment were investigated to evaluate the effectiveness of monitoring forest vegetation management using ground-based and remote sensing techniques. Foliage of Pacific rhododendron (Rhododendron macrophyllum D. Don), golden chinkapin (Castanopsis chrysophylla Dougl.), and hairy manzanita (Arctostaphylos columbiana Piper) sprayed with...
Resource Type:: Masters Thesis

Effect of solution nitrogen and phosphorus on growth, carbon allocation and nitrogen fixation of red alder seedlings

Creator:: Lipp, Cynthia C.
Abstract:: The effect of solution nitrogen (N) and phosphorus (P) concentrations on biomass production and N₂ fixation of red alder (Alnus rubra Bong.) seedlings grown in perlite-filled pots in a climate controlled growth room were studied. Nodulated seedlings were subjected to 12 different nutrient solution combinations of nitrogen and phosphorus and...
Resource Type:: Masters Thesis

Thinning and urea fertilization effects on emerging grand fir (Abies grandis) foliage and growth of western spruce budworm (Choristoneura occidentalis) larvae

Creator:: Savage, Thomas J.
Abstract:: The objective of this study was to determine how the balance of carbon to nitrogen in a grand fir ecosystem affects the chemistry of emerging grand fir foliage and the growth of western spruce budworm larvae. Forest plots in the grand fir zone of eastern Oregon were thinned, thinned and...
Resource Type:: Masters Thesis

Growing winter wheat on poorly drained soil

Creator:: Goetze, Norman R. (Norman Richard), Stoltz, Michael, Jackson, T. L. (Thomas Lloyd), 1922-, and Oregon State University. Extension Service
Abstract:: Published July 1981. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: , which in large quantities is toxic to wheat seedlings. Seedlings growing on low ridges of poorly drained

The economic effects of ozone on U.S. agriculture : a sector modeling approach

Creator:: Hamilton, Scott A.
Abstract:: Tropospheric ozone is a pollutant which has detrimental effects on crop yields. The level of ambient ozone can be reduced by environmental policy changes and enforcement. The purpose of this study was to estimate the welfare effects of such changes in ambient ozone using recently available plant response data and...
Resource Type:: Dissertation
Full Text:: found to have little effect on estimates of total welfare changes but had important consequences for the

The effects of light on photosynthesis and rooting of leafy cuttings of Pisum sativum L.

Creator:: Davis, Tim D.
Abstract:: The effects of light incident on leafy cuttings is quite complex because' light influences several factors which may affect root formation. One effect of light is to influence the carbohydrate status of the cutting by influencing photosynthesis. The role of current photosynthate in the rooting of leafy cuttings is uncertain....
Resource Type:: Masters Thesis
Full Text:: The effect on rooting of defoliation of pea cuttings at different times during the rooting period 55

ScholarsArchive@OSU

Mt. St. Helens ash : considerations of its fallout on rangelands

Survival of natural and planted seedlings under a shelterwood in southwest Oregon

Performance of artificially shaded container-grown Douglas-fir seedlings on skeletal soils

Glyphosate and hexazinone mixtures : effects on weeds and Douglas-fir transplants

Damage to regeneration during shelterwood overstory removal on steep terrain : a case study

Effect of temperature on nutritional requirements of plants

Tilling compacted forest soils following ground-based logging in Oregon

Response of Artemisia tridentata ssp. wyomingensis and Stipa thurberiana to nitrogen amendments

Restoring productivity of compacted forest soils with tillage

Survival and some physiological aspects of tissue cultured cells from Douglas-fir (Pseudotsuga menziesii Mirb. (Franco)) and a poplar hybrid after freezing to liquid nitrogen temperature

Relationships of tree growth to nitrogen and water availability in a sheep-tree-pasture system in Douglas County, Oregon : field case study and shadehouse simulation

Germination and first-year survival of red alder seedlings in the central Coast Range of Oregon

Effects of nutrient and light limitation on mountain hemlock : susceptibility to laminated root rot

The effect of light intensity on Douglas-fir foliage quality : survival and development of Western spruce budworm

Detection of 2,4-D herbicide damage using ground-based measurements : implications for remote sensing

Effect of solution nitrogen and phosphorus on growth, carbon allocation and nitrogen fixation of red alder seedlings

Thinning and urea fertilization effects on emerging grand fir (Abies grandis) foliage and growth of western spruce budworm (Choristoneura occidentalis) larvae

Growing winter wheat on poorly drained soil

The economic effects of ozone on U.S. agriculture : a sector modeling approach

The effects of light on photosynthesis and rooting of leafy cuttings of Pisum sativum L.

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