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Phosphorus requirement of red hill soils as shown by greenhouse and chemical tests

Creator:: Williams, Lewis Harrigfeld
Resource Type:: Masters Thesis
Full Text:: phosphorus study was conducted under the supervision of Professor C. V. Ruzek. Dr. L. A. Aiban, Dr. A. W

Soil moisture and temperature relationships under fallow in eastern Oregon

Creator:: Russelle, Michael P.
Abstract:: Time of stand establishment is a critical factor affecting yields of winter wheat and barley in the fallow-crop rotation areas of the Pacific Northwest. Farmers in this winter-rainfall region are dependent on residual moisture in the seed zone for germination, because significant precipitation does not usually occur until after the...
Resource Type:: Masters Thesis
Full Text:: for first and 70% emergence for wheat were 149 and 210 using a base temperature of 0.7 and 0.4 C

Availability of phosphorus in central Oregon soils in comparison with selected Oregon soils

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:: these reaction products to plants has been evaluated (Taylor, Gurney, and Lindsay, 1960; Lindsay and

Characteristics of compacted soils from Eastern Oregon

Creator:: Goh, Hock Swee
Abstract:: Soil samples and soil clods were collected from ten potato fields in Eastern Oregon. An index of grain size distribution was sought that would correlate well with compacted soil bulk density. The Hazen coefficient of uniformity was best related to bulk density. The limitations of various indices and their relationship...
Resource Type:: Masters Thesis
Full Text:: index C, on independent variables, grain size distribution, organic matter and Hazen coefficient of

Rainfall, surface sealing, runoff, and erosion on Jory soil series in western Oregon

Creator:: King, Joel Thomas
Resource Type:: Masters Thesis
Full Text:: , 11441 1 Organic Matter Content at Sites A, B, and C 38 2 Organic Matter Content of Aggregate Soil

The effects of gypsum on infiltration and surface properties of some western Oregon soils

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:: on Infiltration and Surface Properties of Some Western Oregon Soils abstract approved: c Redacted

Site quality of western hemlock and chemical characteristics of some western Oregon andic soils

Creator:: Meurisse, Robert Thomas
Resource Type:: Dissertation
Full Text:: for'Robert Thomas Meurisse ACKNOWLEDGEMENTS The author wishes to express his appreciation to Dr. C. T

Readily available manganese in some Oregon soils and its relation to certain other soil factors

Creator:: Kirsch, R. K. (Richard Kneale), 1923-
Abstract:: With agriculture continuing to play an ever-increasing role in our modern economy, more and more attention is being directed toward the hitherto more or less neglected finer points of crop production. In the past it has been the tendency to concentrate research on those factors which most obviously affect agricultural...
Resource Type:: Masters Thesis
Full Text:: , Clackamas, Clatsop, Columbia, Crook, Deschutes, Douglas, C-rant, Harney, Hood River, Jefferson

Response of alfalfa under greenhouse conditions in relation to fertility and chemical properties of two upland soils of Oregon

Creator:: Yahner, Joseph Edward
Resource Type:: Masters Thesis
Full Text:: ìn i.quilibrium oii Solutions . ...... . . ........ 16 EXPERIMENTAL METHODS, MATERIALS, AND C

Distribution and characteristics of loess-like soil parent material in northwestern Oregon

Creator:: Theisen, A. A. (Arthur A.)
Resource Type:: Masters Thesis
Full Text:: report supplies information about a) the geographic distribution, b) the variations in thickness, c

ScholarsArchive@OSU

Phosphorus requirement of red hill soils as shown by greenhouse and chemical tests

Soil moisture and temperature relationships under fallow in eastern Oregon

Availability of phosphorus in central Oregon soils in comparison with selected Oregon soils

Characteristics of compacted soils from Eastern Oregon

Rainfall, surface sealing, runoff, and erosion on Jory soil series in western Oregon

The effects of gypsum on infiltration and surface properties of some western Oregon soils

Site quality of western hemlock and chemical characteristics of some western Oregon andic soils

Readily available manganese in some Oregon soils and its relation to certain other soil factors

Response of alfalfa under greenhouse conditions in relation to fertility and chemical properties of two upland soils of Oregon

Distribution and characteristics of loess-like soil parent material in northwestern Oregon

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