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Molybdenum status of subclover (Trifolium subterraneum) as affected by Mo and S fertilization and soil type

Creator:: Jarrell, Wesley M.
Abstract:: Field studies designed to study residual effects from fertilizer molybdenum were initiated in September 1971 on established grass-clover pastures at ten sites in Western Oregon. Treatments were 0.0 and 1.12 kg molybdenum /ha on plots receiving 0-35-0-20S fertilizer (elemental sulfur-S) and 0.0, 0.56, 1.12 and 2.24 kg molybdenum /ha on...
Resource Type:: Masters Thesis
Full Text:: TYPE Abstract approved: M. Dl Dawson Field studies designed to study residual effects from

Germination and emergence of corn (Zea mays, L) as a function of soil physical parameters

Creator:: Sanchez, Ramon M.
Abstract:: Rates of germination and emergence of corn were measured as influenced by soil physical parameters using blotter paper and a sandy loam soil as growth media. The corn seeds used were a hybrid of Funk's (DJ7xLH93). Experimental conditions were soil temperature of 20°C, 25°C, 30°C, and 35°C, soil water potential...
Resource Type:: Masters Thesis
Full Text:: function of soil physical parameters AN ABSTRACT OF THE THESIS OF Ramon M. Sanchez for the degree of

The mobility and plant availability of boron in selected western Oregon soils

Creator:: Parker, David R.
Abstract:: Several crops grown in the Willamette valley of western Oregon respond to applications of boron fertilizers. The acid, highly-leached soils of this area are naturally low in plant-available B. Application of B to the soil annually or at less frequent intervals is currently recommended, but the fate of applied B...
Resource Type:: Masters Thesis
Full Text:: procedure was developed and adopted to replace the curcumin method. Substitution of 0.02 M CaC1 2 for

Relationship between pore size, particle size, aggregate size and water characteristics

Creator:: Wu, Laosheng
Abstract:: Soil pore size distribution and water characteristics are important for water storage, water movement, and soil-plant interaction studies. Laboratory determinations of water characteristics and pore size distribution are time consuming and costly. Investigators have proposed many models to predict them from routinely available data. Most of the models are related...
Resource Type:: Masters Thesis
Full Text:: content g: percent of saturation L: depth of soil profile m: subscript for medium MABC: Mean Absolute

Fluoride sorption and dissolution reactions in soils

Creator:: Peek, Daniel C.
Abstract:: The reaction of F, often a component of industrial wastes and phosphatic fertilizers, with soil was studied with regard to sorption reactions and resultant changes in solution composition. Sodium fluoride solutions (0.0 to 2.5 mmol/L F) were equilibrated with ten soils for 24h. The soil extract solutions were analyzed for...
Resource Type:: Masters Thesis
Full Text:: been described by the Langmuir adsorption isotherm (Gupta et al., 1982; Chhabra et al., 1980; Hani

Field management effects on the thermal stability and activity of soil enzymes in whole soil and aggregates

Creator:: Bandick, Anna Katrina
Resource Type:: Masters Thesis
Full Text:: recent studies on soil aggregation (Cambardella and Elliott, 1993; Degens et al., 1994; Gupta and

Microbiology of soil aggregates recovered from different crop management systems

Creator:: Mendes, Iêda de Carvalho
Resource Type:: Dissertation
Full Text:: ; Dalal and Meyer, 1986; Elliott, 1986; Gupta and Germida, 1988; Singh and Singh, 1995). Many of these

Soil quality dynamics in an integrated reduced-tillage and cover-cropped vegetable agroecosystem

Creator:: Banners, Candace R.
Abstract:: Soil response and function were investigated following the adoption of an integrated reduced-tillage and cover-cropped vegetable system in the Willamette Valley of Western Oregon. The experiment was conducted over three cropping seasons (2002-2004) at the Oregon State University Vegetable Research Farm (Corvallis, OR). The design was a randomized complete-block with...
Resource Type:: Masters Thesis
Full Text:: properties because aggregates are entrapped in hyphae (Gupta and Germida, 1988; Oades, 1993, Amézketa, 1999

Cover crops and biochemical functional diversity in relation to nitrogen availability in soil

Creator:: Burket, John Zimmerman
Abstract:: Nitrogen availability in agricultural soils from fertilizer, plant residue inputs, and soil organic matter has important implications beyond crop yield. Legume winter cover crops and one fourth the recommended N rate on sweet corn resulted in yields equivalent to those at the recommended rate in the Willamette Valley of western...
Resource Type:: Dissertation
Full Text:: legumes will cause an accumulation of more soil organic N than non-N2 fixing plants (Gupta and Reuszer

Effect of differential amounts of irrigation water deficit on the yield and water use of table beets

Creator:: Amali, Said
Abstract:: The effects of deficit irrigations and nitrogen rates on the yield and size distribution of 'Detroit Dark Red' table beets were investigated during 1985 and 1986. Beets were grown on a Chehalis silty clay loam (fine-silty, mixed , mesic Cumulic Ultic Haploxeroll) (7.5 cm of available water per 30 cm...
Resource Type:: Masters Thesis
Full Text:: ; Gupta,1979; Mack,1979; Hemphill et a1,1982; Gupta,1983), liming (Jackson et al.,1974; Hemphill et al

ScholarsArchive@OSU

Molybdenum status of subclover (Trifolium subterraneum) as affected by Mo and S fertilization and soil type

Germination and emergence of corn (Zea mays, L) as a function of soil physical parameters

The mobility and plant availability of boron in selected western Oregon soils

Relationship between pore size, particle size, aggregate size and water characteristics

Fluoride sorption and dissolution reactions in soils

Field management effects on the thermal stability and activity of soil enzymes in whole soil and aggregates

Microbiology of soil aggregates recovered from different crop management systems

Soil quality dynamics in an integrated reduced-tillage and cover-cropped vegetable agroecosystem

Cover crops and biochemical functional diversity in relation to nitrogen availability in soil

Effect of differential amounts of irrigation water deficit on the yield and water use of table beets

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