Intensive forest management requires efficient logging techniques
to remain economical. Commercial thinnings and shorter
rotations increase piece count inversely to piece size. Continued
research aimed toward effective log handling processes is essential.
The purpose of this study was to evaluate one case of a self-loading
log truck (integral loader and...
This study was conducted to examine the coefficient of drag resistance (µ) between a log and bare forest soil during partial
suspension yarding. Drag resistance in this study was defined as the resistance due to friction between the soil and the log plus the resistance due to the plowing action...
This study compares the production rates and yarding costs of prebunching
with a low investment skyline yarder and swinging with a larger
skyline yarder to full-cycle thinning with the larger yarder The study
analyzes two slackpulling techniques (manual and haulback assisted) and
two carriages (a multi-span carriage and a clamping...
A method for measuring chemical reaction rates in order to
distinguish between different reaction mechanisms is presented.
This method was used to study zero -, first- and second -order reactions
by analyzing the output response to a sinusoidal input of
reactant concentrations in an isothermal continuous stirred tank
reactor.
The...
Amendments and fertilizers applied to optimize crop production and improve soil health also supply inputs of soil organic matter (SOM) and nutrients that affect soil microorganisms. In the dairy-intensive Pacific Northwest, dairy manure is stored as slurry mixtures until conditions are appropriate for soil application. During storage, the manure begins...
On top of time demanding athletic and academic constraints, Division I student-athletes must balance many social identities, that include their race, ethnicity, gender, sexual orientation, social class, religious affiliation, etc. This study attempts to fill the gap by providing student-athletes with marginalized identities a platform to (1) offer their own...
Double-crested cormorants (Phalacrocorax auritus) and Brandt’s cormorants (P. penicillatus) nest sympatrically in a large mixed-species colony on East Sand Island (ESI) in the Columbia River estuary. Ecological theory predicts that such morphologically similar species will partition prey resources when faced with resource limitations. During the summer of 2014, I investigated...
Given the vital role of forest ecosystems in landscape pattern and process, it is important to quantify the effects, feedbacks, and uncertainties associated with forest disturbance dynamics. In western North America, insects and wildfires are both native disturbances that have influenced forests for millennia, and both are projected to increase...
Ectomycorrhizal fungi (EmF) form symbioses with trees. These symbioses profoundly influence forest ecology. Certain EmF form specialized profusions of hyphae, known as ectomycorrhizal fungal mats (mats) which are visible to the naked eye, alter forest soil biogeochemistry, substantially contribute to soil microbial biomass/respiration and support unique microbial communities. Piloderma and...
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David D. Myrold Jane E. Smith
Ectomycorrhizal fungi (EmF) form symbioses with
Polygalacturonase produced by Fusarium oxysporum f. sp.
lycopersici was purified by chromatography on DEAE cellulose, CM
cellulose, and hydroxylapatite. Removal of large amounts of carbohydrate
by chromatography on hydroxylapatite did not affect heat
stability of the enzyme. A large proportion of the remaining carbohydrate
appeared to be covalently linked to...
