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Filtering by: Subject Cover crops -- Environmental aspects -- Oregon Subject Nitrogen in agriculture -- Oregon -- Willamette River Valley

An eleven year study of nitrate leaching in vegetable production with winter cover crops

Creator:

Feaga, Jeff

Abstract:

The Willamette Valley of Oregon has high rates of winter precipitation that cause leaching losses of residual fertilizer nitrogen (N) as nitrate (NO₃). Cover crops may have potential to mitigate N loss. Shallow groundwater was sampled for 11 years from plots planted in summer vegetables with and without winter cover...

Resource Type:

Masters Thesis
Field measurements of nitrate leaching below Willamette Valley row and mint crops

Creator:

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

Abstract:

According to the United States Geological Survey, 9 percent of wells in the Willamette Valley exceed the EPA’s 10 ppm drinking water standard for nitrogen in the NO3– compound, or NO3–-N. A study of 281 domestic drinking water wells in Lane County showed that 22 percent of the wells exceeded...

Resource Type:

Technical Report

Full Text:

) and Smesrud and Selker (1998). 2) Use of cover crops to scavenge N—Research in Oregon and around the