Index Catalog // ScholarsArchive@OSU

Calculated and field-measured soil heat flux : a comparison under two soil water regimes

Creator:: Pikul, Joseph L.
Abstract:: Heat and water vapor flow in summer-fallowed fields in the Pacific Northwest may significantly affect the position and supply of water for germination of fall sown crops. New tillage tools and drill openers used in reduced tillage systems leave a trashy, residue covered surface in contrast to the traditional bare...
Resource Type:: Masters Thesis
Full Text:: formulation of total heat flux consisting of heat flow responses to thermal and moisture gradients. The

Uncertainty in neutron probe measurements of soil moisture for irrigation scheduling

Creator:: Wright, Norman D.
Abstract:: Soil moisture in a crop's root zone must be regularly monitored to accurately predict crop water requirements. Most irrigation scheduling services currently use the neutron probe to monitor soil moisture. Unfortunately, there is a degree of variability associated with use of the neutron probe creating uncertainty in measurements of soil...
Resource Type:: Masters Thesis
Full Text:: Chapter 1. INTRODUCTION 2. BACKGROUND 3. REVIEW OF LITERATURE 3.1 Theory of Moisture Measurement by

Development of oven and Karl Fischer techniques for moisture testing of grass seeds

Creator:: Benjamin, Ethan
Abstract:: Seed moisture is a primary factor influencing seed quality during harvesting, storage, and marketing of grass seed. However, the Association of Official Seed Analysts' Rules for Testing Seeds do not contain methods for moisture testing. The oven methods in use by seed testing laboratories in the U.S. are diverse and...
Resource Type:: Masters Thesis
Full Text:: moisture content. Percentage moisture is determined from charts that relate the measurement of the

Duration of saturation and redox potentials in selected Willamette Valley soils

Creator:: Austin, Will
Resource Type:: Masters Thesis
Full Text:: of Saturation 2 Classifying Soil Moisture Conditions 4 Piezometers and Tensiometers 4 Reduction

Design of capillary wick pore-water samplers and their effects on solute travel time and dispersion

Creator:: Knutson, John H.
Resource Type:: Masters Thesis
Full Text:: measured values (R2 of 0.85) but tended to underestimate Kva. Wetting and draining volumetric moisture

Field evaluation of passive capillary samplers in monitoring the leaching of agrochemicals

Creator:: Brandi-Dohrn, Florian M.
Abstract:: Soil solution samplers have certain inadequacies that limit their range of possible applications. Passive Capillary Samplers (PCAPS), which apply suction to the soil pore-water via a fiber glass wick, have shown promising results in preliminary experiments in regard to collection efficiency of water and of bromide tracers. The objectives of...
Resource Type:: Masters Thesis
Full Text:: steel probes (diameter 3.175 mm). Table 3. Water retention of Willamette Variant loam, wet. Moisture

Measurement of moisture content in unknown mixtures using the freezing process

Creator:: Pagh, Richard T.
Abstract:: Safety concerns at the Hanford Reservation require a way to measure the moisture content of material contained in the high level radioactive waste tanks. The freezing of material next to a probe was proposed by scientists at Pacific Northwest Laboratories (PNL) as one approach to solve this problem. It was...
Resource Type:: Masters Thesis
Full Text:: Measurement of moisture content in unknown mixtures using the

A predictive model for time domain reflectometry soil water content and salinity measurements

Creator:: Flugstad, Benjamin A.
Abstract:: Soil water content and water potential are two important parameters in determining the status of water in the soil. Improvement in the ability to measure these parameters by way of increased speed, accuracy, resolution, imaging volume, ease of automation, as well as reduced calibration requirements and reduced soil disturbance would...
Resource Type:: Masters Thesis
Full Text:: Page 1. INTRODUCTION 1 2. OVERVIEW OF SOIL MOISTURE MEASUREMENT TECHNIQUES 5 2.1 Direct Methods of

Penman-Monteith surface resistance for hybrid poplar trees

Creator:: Butler, Dana Anthony
Abstract:: The application of the widely used Penrnan-Monteith evapotranspiration equation to hybrid poplar trees is impossible without a valid surface resistance. The increase in applications of drip-irrigated hybrid poplar trees for wood chip stock and veneer production, as well as bioremediation, constitutes a need for estimating the evapotranspiration of these trees....
Resource Type:: Masters Thesis
Full Text:: estimates of surface resistance for poplar trees. Six years of weekly soil moisture content for drip

Towards autonomous irrigation : comparison of two moisture sensing technologies, irrigation distribution analysis, and wireless network performance at an ornamental container nursery

Creator:: Bailey, Daniel R.
Abstract:: As ornamental container nurseries face diminishing water allocations, many are looking to automated irrigation solutions to increase their water application efficiency. This thesis presents the findings of a study conducted at a commercial container nursery to determine 1) whether a capacitance or load cell sensor was better suited for monitoring...
Resource Type:: Masters Thesis
Full Text:: : Towards Autonomous Irrigation: Comparison of Two Moisture Sensing Technologies, Irrigation Distribution

ScholarsArchive@OSU

Calculated and field-measured soil heat flux : a comparison under two soil water regimes

Uncertainty in neutron probe measurements of soil moisture for irrigation scheduling

Development of oven and Karl Fischer techniques for moisture testing of grass seeds

Duration of saturation and redox potentials in selected Willamette Valley soils

Design of capillary wick pore-water samplers and their effects on solute travel time and dispersion

Field evaluation of passive capillary samplers in monitoring the leaching of agrochemicals

Measurement of moisture content in unknown mixtures using the freezing process

A predictive model for time domain reflectometry soil water content and salinity measurements

Penman-Monteith surface resistance for hybrid poplar trees

Towards autonomous irrigation : comparison of two moisture sensing technologies, irrigation distribution analysis, and wireless network performance at an ornamental container nursery

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