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Internal moisture relations of standing Douglas-fir trees injected with organic arsenicals

Creator:: Holt, Harvey Allen
Abstract:: Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) ranging from 9.6 to 14.3 inches diameter breast height were treated with the organic arsenicals, monosodium methanearsonate (MSMA) and cacodylic acid. Treatments were applied at monthly intervals from February, 1967 to October, 1968, to ten to 25 trees each month. Treated trees were sampled in...
Resource Type:: Dissertation

Water content and electrical conductivity profile measurements for dispersive media using enhanced time domain and frequency domain models

Creator:: Flugstad, Benjamin A.
Abstract:: Water conservation and water quality are rapidly increasing in importance in all areas of the world. The ability to accurately measure soil water content and salinity, over a wide variety of conditions, is key to meeting this need. A set of forward prediction models and waveform interpretation algorithms to extract...
Resource Type:: Dissertation
Full Text:: Irrigation) . 240 Figure 4.3a: Soil Moisture Content Measurement Cell w/PCBA at Bottom and Parallel Wire

Dielectric properties of defects on wood surfaces

Creator:: Forrer, Johannes B.
Abstract:: Raw material costs and limited material availability and quality have created significant interest in and opportunities for the application of nondestructive evaluation techniques to improve wood processing technologies. The incentives come from the desire to 1) manufacture the highest valued product, 2) conserve the amount of raw material used, 3)...
Resource Type:: Dissertation
Full Text:: moisture content conditions typically found in wood processing. This research required the development of

Measurement and interpretation of physical properties of soils

Creator:: Nagpal, Narender Kumar, 1942-
Abstract:: One of many important physical properties that must be known to understand transport phenomena in soils is pore size distribution. Presently the pore size distributions of soils are most commonly obtained from soil water characteristic curves. The soil water characteristic curves are usually obtained by the pressure plate technique. It...
Resource Type:: Dissertation
Full Text:: Measurement and interpretation of physical properties of

Addressing Data Resolution in Precision Agriculture

Creator:: Kelley, Jason
Abstract:: Irrigated agriculture constitutes the greatest consumptive water use globally, so that irrigation efficiency measures are an important part of global efforts to best utilize this limited resource. However, greater irrigation efficiency must be achieved while simultaneously maintaining or increasing crop yields and farming profitability. Incremental water use decisions are made...
Resource Type:: Dissertation
Full Text:: irrigation demand. Soil moisture measurement helps determine how much water that is available to crops

Pressure measurement in wood as a method to understand impregnation processes : conventional and supercritical carbon dioxide

Creator:: Schneider, Philip F.
Abstract:: Two approaches to improving wood treatability include the modification of pressure schedules during conventional liquid treatments and the use of supercritical fluids (SCFs). In both of these techniques, pressure differences are important for transporting materials into wood. The level of pressure and its change during SCF treatments are also important...
Resource Type:: Dissertation

Wood properties and use of sensor technology to improve optimal bucking and value recovery of Douglas-fir

Creator:: Acuna, Mauricio A.
Abstract:: There are a number of wood properties which affect the quality of forest products such as lumber and pulp. Of these, wood density is considered by some to be the single most important physical characteristic because it is an excellent predictor of strength, stiffness, hardness, and paper-making capacities. Accurately assessing...
Resource Type:: Dissertation
Full Text:: likely to lead to measurement, segregation and supply of a wider range of wood properties for forest

Durability Assessment of Wood Composites Using Fracture Mechanics

Creator:: Mirzaei, Babak
Abstract:: The advent of synthetic adhesives has transformed the structural applications of wood. However, a persistent issue in adhesively-bonded wood products has been moisture durability. When designing wood based composites, moisture durability will depend on both the wood phase and the adhesive phase. A key question, therefore, is how does one...
Resource Type:: Dissertation
Full Text:: applications of wood. However, a persistent issue in adhesively-bonded wood products has been moisture

Improving soil water determination in spatially variable field using fiber optic technology and Bayesian decision theory

Creator:: Sayde, Chadi
Abstract:: Achieving and maintaining sustainability in irrigated agriculture production in the era of rapidly increasing stress on our natural resources require, among other essential actions, optimum control and management of the applied water. Thus, a significant upgrade of the currently available soil water monitoring technologies is needed. The primary goal of...
Resource Type:: Dissertation
Full Text:: moisture measurements are quite uncertain. Some degree of uncertainty is intrinsic to the measurement

In-forest log segregation based on acoustic measurement of wood stiffness

Creator:: Amishev, Dzhamal Y.
Abstract:: To remain competitive, the forest products industry needs to look for new and innovative processes and technologies to not only reduce costs but also to recover more value through the entire seedling-to-customer forest products supply chain. It is well recognized that measuring wood properties of logs in real time during...
Resource Type:: Dissertation
Full Text:: presented on June 2, 2008. Title: In-Forest Log Segregation Based on Acoustic Measurement of Wood

ScholarsArchive@OSU

Internal moisture relations of standing Douglas-fir trees injected with organic arsenicals

Water content and electrical conductivity profile measurements for dispersive media using enhanced time domain and frequency domain models

Dielectric properties of defects on wood surfaces

Measurement and interpretation of physical properties of soils

Addressing Data Resolution in Precision Agriculture

Pressure measurement in wood as a method to understand impregnation processes : conventional and supercritical carbon dioxide

Wood properties and use of sensor technology to improve optimal bucking and value recovery of Douglas-fir

Durability Assessment of Wood Composites Using Fracture Mechanics

Improving soil water determination in spatially variable field using fiber optic technology and Bayesian decision theory

In-forest log segregation based on acoustic measurement of wood stiffness

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