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Filtering by: Contributor advisor sim Young, J. L.

Influence of anhydrous ammonia on the solubility of soil organic matter

Creator:

Mangum, Doris Louella

Abstract:

Four surface and three subsurface horizons of agriculturally important Oregon soils were exposed to excessive volumes of anhydrous ammonia and reequilibrated with the atmosphere for several time periods prior to extraction with water. The carbon solubilized was determined by a modified wet combustion technique. Nitrogen in the soils, extracts, and...

Resource Type:

Masters Thesis
Ion uptake by wheat (Triticum aestivum VILL., Host) as a function of soil water suction and soil temperature

Creator:

Young, Richard Su-Shung

Abstract:

The effects of soil temperature and soil water suction on the uptake of calcium, magnesium, and potassium by wheat (Triticum aestivum VILL., Host) were studied. Companion studies on uptake of nitrogen and phosphorus provided background for discussion of the results. Plants were grown in perlite slabs separated from an osmotic...

Resource Type:

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

Creator:

Laurent, Tom Edwin

Resource Type:

Masters Thesis
Fractionation and some properties of water-dispersible soil organic-mineral particles

Creator:

Spycher, Gody

Resource Type:

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

Creator:

King, Joel Thomas

Resource Type:

Masters Thesis
Sediment, phosphorus and nitrogen in storm runoff from some Willamette Valley croplands

Creator:

Simmons, F. William

Resource Type:

Masters Thesis