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Creator:: Pronold, Michael Joseph
Abstract:: The effects of broadcast gypsum on infiltration rates, crusting, aggregate stability, and runoff and sediment yields were analyzed during the winter months on three West Oregon soils. The results were used to evaluate its utility as a management tool to help control erosion. An application rate of two metric tons...
Resource Type:: Masters Thesis
Full Text:: . I also thank Dr. J. F. Kling and Dr. M. J. English for serving on my committee. The valuable

Creator:: Doerge, Thomas A.
Abstract:: A diversity in climate, geologic parent material, and soil characteristics exist in Jackson, Josephine, Coos, and Douglas Counties of southwest Oregon. Previous field trials and soil testing results have revealed uncertainties as to the phosphorus (P) status of the soils in this area. Twenty-four sites from nine agriculturally significant soil...
Resource Type:: Masters Thesis
Full Text:: acid extraction procedure of Saunders and Williams (1955). Enwezor and Moore (1965) and Ipinmidum

Creator:: Theisen, A. A. (Arthur A.)
Resource Type:: Masters Thesis
Full Text:: 9/ ELEVATION IN FEET '-? ¼;;:: COLUMBIA AND OTHER RIVERS WILLANETTE RIVER J' AND STREAMS

Creator:: Janghorbani, Morteza
Abstract:: Acidity distribution within any given soil profile is dependent on mineralogical make-up of the parent material as well as environmental conditions prevalent during the weathering history of the soil. An experiment was designed to study the distribution pattern of exchange acidity, exchangeable aluminum, exchangeable manganese and pH of six acid...
Resource Type:: Masters Thesis
Full Text:: >^ Typed by J. Lewis for Morteza Janghorbani ACKNOWLEDGEMENT The writer is deeply indebted to the

Creator:: Araos, Jose Fernando
Abstract:: The objectives of this study were to evaluate and compare the availability of native and applied P in Central Oregon pumice soils with that in Willamette valley soils and calcareous soils from Eastern Oregon. The experimental work to meet these objectives included laboratory and greenhouse studies. The removal of P...
Resource Type:: Masters Thesis
Full Text:: his correction of the manuscript, and to Dr. D. P. Moore, Dr. M. E. Harward, and Dr. Ellis Knox

Creator:: Yahner, Joseph Edward
Resource Type:: Masters Thesis
Full Text:: I F(aH)nl L àB j coiloid L J solution aH aH []co11oid [n] solution 19 r, in the case

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