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Filtering by: Subject Soils -- Potassium content

Chemical properties of soils related to seasonal fluctuations in exchangeable potassium

Creator:

Etter, Harold Mac Donald

Abstract:

Representative sites of the Dayton, Woodburn, Jory, Quillayute, Astoria, Willamette, Walla Walla, Deschutes, Laki and Owyhee soil series were investigated for seasonal changes in exchangeable potassium in air dry samples. No consistent seasonal variations were found which could be attributed to wetting and drying in the field. Cropping reduced the...

Resource Type:

Masters Thesis
The potassium status of Eastern and Central Oregon soils

Creator:

Abuzkhar, Ahmed Ali

Abstract:

The potassium status of selected soils from central and eastern Oregon, that have shown a wide range in response from potassium was investigated. The silt and clay minerals were identified using X-ray crystallography. The potassium extracted by water, NH₄OAc, and HNO₃ was evaluated on the total soil and on the...

Resource Type:

Masters Thesis
Soil factors related to potassium deficiency of stone fruits in the Willamette Valley

Creator:

Selig, Randy S.

Resource Type:

Masters Thesis
Postpartum disorders associated with high potassium forages in Holstein cows

Creator:

Crill, Roberta L.

Abstract:

Until recently, occurrence of milk fever (MF) has been attributed to prepartum calcium intake. However, researchers in Iowa have concluded that high prepartum dietary potassium (K) is the major cause of MF. Potassium concentrations have been increasing on manure fertilized soils over the last 20 years. Grasses grown on these...

Resource Type:

Masters Thesis