Index Catalog // ScholarsArchive@OSU

The effect of soil acidity and lime placement on root growth and yield of winter wheat and alfalfa

Creator:: Kauffman, Marvin Dean
Abstract:: The application of lime to an acid Nekia soil significantly increased the yield of winter wheat and alfalfa in a field experiment. Crop yields maximized when the lime was partially mixed into the surface four inches of the soil. Thorough mixing of the lime into the surface six inches of...
Resource Type:: Dissertation
Full Text:: growth and yield of winter wheat and alfalfa AN ABSTRACT OF THE THESIS OF Marvin Dean Kauffman for the

Inorganic nitrogen and soil biological dynamics in cover crop systems

Creator:: Kauffman, Susan Muna
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Susan M. Kauffman for the

Quantifying C and N contents and isotope signatures of SOM pools in the H. J. Andrews DIRT plots

Creator:: Keirstead, Heath
Abstract:: The mechanisms governing short- and long-term belowground carbon dynamics need to be understood. As part of a larger project developed to assess the effect of quantity and quality of litter inputs on the rate of soil organic matter (SOM) formation, I examined SOM in the H. J. Andrews Detritus Input...
Resource Type:: Masters Thesis
Full Text:: Signatures of SOM poois in the H. J. Andrews DIRT plots. Abstract approved: Elizabeth W. S The mechanisms

Effects of ryegrass residue management on Dayton soil organic carbon content, distribution and related properties

Creator:: Chapin, Michele F.
Abstract:: Total organic carbon, total nitrogen, microbial respiration and enzyme activity (β-glucosidase) were measured on several horizons of a Dayton silt loam (fine, montmorillonitic, mesic, Typic Albaqualf) soil cropped to annual ryegrass under two straw residue management systems. The study evaluated the effects of annual burning of straw residues or annual...
Resource Type:: Masters Thesis
Full Text:: research. Special thanks to Dr. Boone Kauffman, Dr. W. Young II. and Mark Mel lbye for their interest in

Homogenization of Detrital Leachate in an Old-Growth Coniferous Forest, OR : DOC Fluorescence Signatures in Soils Undergoing Long-Term Litter Manipulations

Creator:: Strid, April R.
Abstract:: Soil dissolved organic carbon (DOC) is a small but crucial part of the forest carbon cycle. Characterizing the relationship between detrital inputs and soil DOC chemistry is crucial to understanding the ultimate fate of root carbon, fallen wood and needles. Chemical differences in the DOC pool may help to explain...
Resource Type:: Masters Thesis
Full Text:: recognize the H. J. Andrews headquarters crew for keeping everything running smoothly. I would also like

Impact of a red clover winter cover crop on carbon and nitrogen mineralization by microorganisms in soil aggregates

Creator:: Ndiaye, Aissatou
Abstract:: Although legumes have been widely studied for their nitrogen-fixing ability, it is uncertain to what extent legume cover crops achieve their nitrogen-fixing potential under the climatic conditions encountered in western Oregon. Furthermore, it is unknown what factors control the proportions of legume cover crop N that are either sequestered into...
Resource Type:: Masters Thesis
Full Text:: professor, Dr Peter J. Bottom ley, thank for his patience, his friendship, his help in the lab analysis

The status of organic materials in several southern Willamette Valley grassland soils

Creator:: Laurent, Tom Edwin
Resource Type:: Masters Thesis
Full Text:: - Southern Willamette Vallev;rassland Soils Abstract approved: Redacted for Privacy J. L. Young 4

Microbiology of soil aggregates recovered from different crop management systems

Creator:: Mendes, Iêda de Carvalho
Resource Type:: Dissertation
Full Text:: FROM DIFFERENT CROP MANAGEMENT SYSTEMS. Abstract approved: Peter J. Bottomley My thesis research

Exploring Soil-Landscape Relationships on the Pacific Slope of Monteverde, Costa Rica

Creator:: Hesson, Kevin M.
Abstract:: Landscape positions have been used to determine soil properties. My soil study in Monteverde on the Pacific slope of Costa Rica was designed to examine soil-landscape relationships for sites with various land use histories and management. Soil pits were dug at Nacimiento y Vida, Crandell, Curi-cancha, La Calandria, and Finca...
Resource Type:: Masters Thesis
Full Text:: : _________________________ Ronald J. Reuter Landscape positions have been used to determine soil properties. My

A model for determining soil contrast and its application to five different soil orders

Creator:: Villamayor, Faustino Paysan
Abstract:: A well-defined, quantitative model for determining soil contrast was developed to improve soil survey interpretations concerning the effects of mixtures of different kinds of soils on agricultural land use. The model was evaluated by determining the levels and reasons for soil contrast on mapped soil areas representing 5 different landscapes,...
Resource Type:: Dissertation
Full Text:: privacy Professor J. Herbert Huddleston A well-defined, quantitative model for determining soil contrast

ScholarsArchive@OSU

The effect of soil acidity and lime placement on root growth and yield of winter wheat and alfalfa

Inorganic nitrogen and soil biological dynamics in cover crop systems

Quantifying C and N contents and isotope signatures of SOM pools in the H. J. Andrews DIRT plots

Effects of ryegrass residue management on Dayton soil organic carbon content, distribution and related properties

Homogenization of Detrital Leachate in an Old-Growth Coniferous Forest, OR : DOC Fluorescence Signatures in Soils Undergoing Long-Term Litter Manipulations

Impact of a red clover winter cover crop on carbon and nitrogen mineralization by microorganisms in soil aggregates

The status of organic materials in several southern Willamette Valley grassland soils

Microbiology of soil aggregates recovered from different crop management systems

Exploring Soil-Landscape Relationships on the Pacific Slope of Monteverde, Costa Rica

A model for determining soil contrast and its application to five different soil orders

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