Index Catalog // ScholarsArchive@OSU

Creator:: Davis, Jennifer H.
Abstract:: Riparian ecosystems, through their unique positions in the agricultural landscape, have the potential to mitigate nutrient loading to streams. This study was conducted to gain a better understanding of N cycling in a poorly drained Grass Riparian Zone (GRZ) and adjacent Perennial Ryegrass seed Field (PRF) in the Willamette Valley,...
Resource Type:: Dissertation
Full Text:: RIPARIAN ZONE IN CONTROLLING THE FATE OF NITROGEN IN A POORLY DRAINED AGRICULTURAL LANDSCAPE Abstract

Creator:: Runes, Heather B.
Abstract:: Due to its frequent use in agriculture and its frequent detection in surface water, atrazine was chosen as a model compound to study the treatment capability of a surface flow wetland used to remediate irrigation runoff at a container nursery near Portland, Oregon. Further evaluation of treatment of atrazine was...
Resource Type:: Dissertation
Full Text:: There is growing concern that pesticide use practices both in agricultural and urban areas will result

Creator:: Moberg, Dean P., Rambo, Neil L., and Washington County Soil and Water Conservation District (Or.)
Abstract:: Survey In 1995, the Washington County Soil & Water Conservation District interviewed 90 farmers in northwest Oregon's Tualatin River Basin, using a survey developed by the USDA - Natural Resources Conservation Service (NRCS) and Oregon State University (OSU) Extension Service. Crop rotations, yields, tillage, fertilizer and irrigation practices were recorded....
Resource Type:: Technical Report
Full Text:: quality, increase farm profits and strengthen th e agricultural industry so it continues to play a vital

Creator:: Oregon State University. Extension Service, Colquhoun, Jed, Lins, Ryan D., and Cole, C. (Charles M.)
Abstract:: Recent concerns about surface water quality near agricultural production areas have stimulated interest in “best management practices” to reduce the risk of off-site sediment, pesticide, and nutrient movement. Vegetative filter strips can be one component of an integrated management system to reduce these risks.
Resource Type:: Technical Report
Full Text:: - erate in waterways surrounding agricultural fi elds, thus risking contamination and spread of

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

Creator:: Tanaka, Katsuya
Abstract:: This dissertation consists of three papers on agricultural nonpoint source pollution and control. The first paper focuses primarily on agricultural land use changes under alternative conservation policies. The second and third papers address environmental implications of these policies and their cost effectiveness. In the first paper, the effect of alternative...
Resource Type:: Dissertation

Creator:: Moreno, Daniel
Abstract:: The extent of agricultural drainage has created concern for its potential undesirable effects on surface water quality. Land applications of liquid manure on tile drain fields have the potential to transport solutes and bacteria to the drains following precipitation or irrigation events and many times are directly sent to a...
Resource Type:: Masters Thesis
Full Text:: agricultural drainage has created concern for its potential undesirable effects on surface water quality. Land

Creator:: Marn, Carolyn M. (Carolyn Mary), 1962-
Abstract:: Evaporation ponds that dispose of agricultural drainwater provide attractive habitat for waterbirds but may result in contaminant exposure that impairs reproduction. I estimated post-hatching survival and evaluated productivity estimates for American avocets (Recurvirostra americana) nesting at evaporation ponds in the Tulare Basin, California from 1991 to 1993. Avocets and Black-necked...
Resource Type:: Dissertation
Full Text:: approved: Robert G. Anthony Evaporation ponds that dispose of agricultural drainwater provide attractive

ScholarsArchive@OSU