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Filtering by: Subject Groundwater Creator Selker, John S.

Irrigation system maintenance, groundwater quality, and improved production

Creator:

Oregon State University. Extension Service and Selker, John S.

Abstract:

We first need to note that the soil nitrogen that makes plants green is primarily in the form of nitrate, and this nitrogen is accessible to plants specifically because it stays dissolved in the soil water. In a typical corn field, where the bulk of the roots are in the...

Resource Type:

Technical Report

Full Text:

Irrigation System Maintenance, Groundwater Quality, and
Pesticides in southern Willamette Valley groundwater

Creator:

Selker, John S. and Oregon State University. Extension Service

Abstract:

The region’s high winter rainfall provides aquifers that are often within 50 feet of the land surface. In many parts of the United States and in other countries where groundwater is this close to the surface, pesticide contamination has been observed. Thus, with our high population, significant applications of pesticides,...

Resource Type:

Technical Report

Full Text:

Groundwater and Nitrogen Management in Willamette