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Creator:: Huddleston, J. H. (James Herbert), 1942- and Oregon State University. Extension Service
Abstract:: The Oregon Water Quality Decision Aid (OWQDA) is a first-tier screening tool that allows you to make a broad determination of the likelihood that a specific chemical, when applied to a specific Oregon soil, will move through the soil and contaminate groundwater. This determination is called the groundwater vulnerability rating.
Resource Type:: Technical Report
Full Text:: assessing groundwater contamination risk from specific soil-pesticide combinations J.H. Huddleston The

Creator:: Oregon State University. Extension Service, Kerle, Elizabeth A., Jenkins, Jeffrey J., and Vogue, Peggy A.
Abstract:: Published January 1994. Reprinted April 2007. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: Groundwater and Surface Water Protection, EM 8561-E (Oregon State University Extension Service) � EM 8561-E

Creator:: Andrews, Gail Glick and Oregon State University. Extension Service
Abstract:: Your groundwater is at higher risk of contamination from excess nitrogen fertilizer if you have soils that drain quickly, such as river loam, coastal sand, or volcanic deposits.
Resource Type:: Technical Report
Full Text:: in the groundwater in the form of nitrate, a common pollutant. Your groundwater is at higher risk of

Creator:: Miner, Ron and Oregon State University. Extension Service
Abstract:: Spreading livestock and poultry manure on crop and pastureland is a way to reclaim the value of the plant nutrients in manure. This practice is the most popular and widely recommended way to utilize these manures. Nitrogen and phosphorus are the nutrients of greatest value in manure and are the...
Resource Type:: Technical Report
Full Text:: Reducing the Risk of Groundwater Contamination from

Creator:: Oregon State University. Extension Service, Kerle, E. A., Vogue, P. A., Jenkins, J. J., and Huddleston, J. H.
Abstract:: Published January 1994. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: 52 99 J Site assessment for groundwater vulnerability $1.00 to pesticide contamination E.A. Kerle

Creator:: Oregon State University. Extension Service, Kerle, Elizabeth A., Vogue, Peggy A., Jenkins, Jeffrey J., and Huddleston, J. H. (James Herbert), 1942-
Abstract:: The procedure described in this publication helps you assess the potential for any specific pesticide to travel through any specific soil to reach groundwater.
Resource Type:: Technical Report
Full Text:: Site Assessment for Groundwater Vulnerability to Pesticide

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

Creator:: Miner, Ron and Oregon State University. Extension Service
Abstract:: Manure in solid and liquid forms is used as a fertilizer and soil amendment on many farms.
Resource Type:: Technical Report
Full Text:: Assessing the Risk of Groundwater Contamination from

Creator:: Huddleston, J. H. (James Herbert), 1942- and Oregon State University. Extension Service
Abstract:: Four factors govern the potential for groundwater contamination by pesticides passing through the soil: • Properties of the soil • Properties of the pesticide • Hydraulic loading on the soil • Crop management practices
Resource Type:: Technical Report
Full Text:: How soil properties affect groundwater vulnerability

Creator:: Andrews, Gail Glick and Oregon State University. Extension Service
Abstract:: Plants need nitrogen to grow. However, if there is more nitrogen (in the form of nitrate) in the soil than plants need, some of it may leach below the rooting zone and end up in the groundwater that supplies your drinking water.
Resource Type:: Technical Report
Full Text:: and end up in the groundwater that supplies your drinking water. High levels of nitrate in groundwater

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