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Creator:: Dingus, Delmar DeLee
Abstract:: Soil samples from the Mazama tephra deposit were collected from the AC and C2 horizons at five different locations along the axis of the main depositional lobe. The clay fraction from the samples was recovered and studied by means of chemical, x-ray, DTA and electron microscopy methods in order to...
Resource Type:: Dissertation
Full Text:: author wishes to express his appreciation to Dr. M. E. Harward who has given generously of his time and

Creator:: Gaynor, John Donald
Resource Type:: Dissertation
Full Text:: . To the members of my graduate committee: Drs. L. Boersma, M. B. Williams and A. P. Appleby for their

Creator:: Warner, Susan Ann
Abstract:: Decomposition of forest litter is a complex process involving interactions between physical, chemical and biological factors. As litter decomposes it is chemically altered. Cation exchange capacities of litter represent a means of characterizing the number of hydrophilic acid groups. Some kind of soil-root ion exchange mechanisms are utilized by the...
Resource Type:: Masters Thesis
Full Text:: Dolores Dunn for Susan Ann Warner ACKNOWLEDGEMENTS I thank my major professor, Dr. C. T. Youngberg

Creator:: Rhue, Roy Dean
Abstract:: The time-concentration interaction of Al toxicity in the root meristems of Brevor wheat was studied using the L.D. 50 as a criteria for Al damage. The L.D. 50 represented a precise, well defined degree of biological damage which was easily reproduced under conditions where factors like temperature, pH, nutrient concentration,...
Resource Type:: Dissertation
Full Text:: : VmC V K+C)m where V is the absorption velocity in mm per kg per hour, V ism the maximum absorption

Creator:: Phillips, Michael John
Abstract:: To obtain data on the decomposition of the forest floor, a battery operated electrolytic respirometer was developed making it possible to measure CO₂ evolution from field moist forest floor samples in situ independent of root respiration. Banks of four respirometers powered by two 12-volt batteries were installed in three old...
Resource Type:: Masters Thesis

Creator:: Hammermeister, Dale P.
Abstract:: Experiments were carried out to study the movement of water and halide anions in perched water tables or saturated zones in the soil and upper rock mantle of eight different experimental sites located on low hills near the western border of the Willamette Valley. At each site the experimental procedure...
Resource Type:: Dissertation
Full Text:: Injection of Four Liters of 0.1 M KBr 5.32. Summary of the Movement of I- from the C Horizon Line 108

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