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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:: must be frequently checked against measurements of soil moisture taken in situ. Measurement of a

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:: moisture flow. Soil temperature responses to soil heat flow during the warm part of the season alter the

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

Morphological and anatomical responses of selected coastal salt marsh plants to soil moisture

Creator:: Seliskar, Denise M.
Resource Type:: Masters Thesis
Full Text:: salt marsh plants to soil moisture AN ABSTRACT OF THE THESIS OF Denise M. Seliskar for the degree of

Effect of elevation, aspect, canopy, and season on soil temperature measurements for soil classification

Creator:: Green, David L.
Abstract:: The effects of aspect, canopy, elevation, and season both singly and in combination on soil temperatures at 50 cm depths were evaluated. The objectives of the study were (i) to develop a standard procedure for obtaining soil temperature data adequate to classify soils at the family and great group levels,...
Resource Type:: Masters Thesis
Full Text:: Soil Temperature Measurement and Predictability 6 Environmental and Physical Factors Influencing

Interaction of ethofumesate with dry soil

Creator:: McAuliffe, David
Abstract:: Previous studies have shown loss of ethofumesate activity when the herbicide was applied to dry soil (2% w/w moisture content) in both field and greenhouse studies, even when rainfall or irrigation was received within a few days. Laboratory studies were conducted to determine the mechanism for this activity loss. Dry...
Resource Type:: Dissertation
Full Text:: applied to dry soil (2% w/w moisture content) in both field and greenhouse studies, even when rainfall or

Soil moisture storage, distribution, and use by winter wheat in a 250-350 mm precipitation zone of eastern Oregon

Creator:: Henderson, Robert L.
Abstract:: The semi-arid dryland wheat-producing areas of the Pacific Northwest are characterized by cool, moist winters and dry, hot summers. The amount of annual precipitation is generally quite variable and inadequate for annual cropping. Where soil depth is adequate, the predominant loessal soils generally supply sufficient moisture for small grain production...
Resource Type:: Masters Thesis
Full Text:: Soil Moisture Storage, Distribution, and Use by Winter

The modelling of moisture content distributions on censored readings from a resistance meter

Creator:: Zwick, Robert L., Cook, Jean A., Western Dry Kiln Clubs, and Western Dry Kiln Clubs. Meeting (36th : 1985)
Resource Type:: Conference Proceeding
Full Text:: measurement of the moisture content of kiln-dried lumber: - hand-held resistance meters - in-line capacitance

The development of a "moisture gradient" meter for pencil slats

Creator:: Rhemrev, John, Rhemrev, Richard, Smith, Harvey H., Western Dry Kiln Association, and Western Dry Kiln Association. Meeting (40th : 1989)
Resource Type:: Conference Proceeding
Full Text:: THE DEVELOPMENT OF A "MOISTURE GRADIENT" METER FOR PENCIL SLATS

Soil physical properties and available water capacity of southwest Oregon forest soils

Creator:: Flint, Alan L.
Abstract:: Measurements for water retention calculations and physical characterization were made on skeletal and non-skeletal soils in southwest Oregon. A new bulk density sampler was designed for the physical characterization of the steep, skeletal soils commonly encountered in this area. The new sampler and the techniques required for the measurement and...
Resource Type:: Masters Thesis
Full Text:: ABSTRACT A sampler was developed for measurement of both rock fragment content and soil bulk density. The

ScholarsArchive@OSU

Uncertainty in neutron probe measurements of soil moisture for irrigation scheduling

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

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

Morphological and anatomical responses of selected coastal salt marsh plants to soil moisture

Effect of elevation, aspect, canopy, and season on soil temperature measurements for soil classification

Interaction of ethofumesate with dry soil

Soil moisture storage, distribution, and use by winter wheat in a 250-350 mm precipitation zone of eastern Oregon

The modelling of moisture content distributions on censored readings from a resistance meter

The development of a "moisture gradient" meter for pencil slats

Soil physical properties and available water capacity of southwest Oregon forest soils

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