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Estimated costs of reducing nonpoint phosphorus loads from agricultural land in the Tualatin Basin, Oregon Public Deposited

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  • About one-third of the land in the Tualatin Basin is used for agricultural production (Miner, Scott, and Wood, 1994). The variety of crops produced includes grains, specialty seeds, vegetables, fruits, berries, and nursery corps. Cattle and hog enterpris­es are the most prevalent livestock operations in the area (measured by number of head), with small numbers of dairy and sheep operations also present. Agricultural production can be a nonpoint source of phosphorus pollution. One alternative in helping to meet Total Maximum Daily Load (TMDL) limits for phosphorus in the Tualatin River is to decrease the loading of phosphorus from agricultural sources. Potential sources of agricultural phosphorus pollution are from applications of phos­phorus fertilizers and livestock wastes through surface runoff on sediments and groundwater interflows (Wolf, 1993). A range of best management practices (BMPs) has been identified to address these sources (Washington County Soil and Water Conservation District, 1991 ); most are technically feasible to implement. Documented reductions in pollution due to adoption of these practices are generally not available, but most experts agree that the practices would result in decreased levels of phospho­rus loads from agriculture. This report describes a set of management practices that have been suggested to reduce agricultural nonpoint source pollution and estimates the economic impacts of adopting these practices.
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  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2005-12-22T19:43:06Z (GMT) No. of bitstreams: 1 TUALATIN-9_ocr.pdf: 16414934 bytes, checksum: 8ee07290701bbb163a331a4a183f5809 (MD5)
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  • description.provenance : Made available in DSpace on 2005-12-22T19:43:06Z (GMT). No. of bitstreams: 1 TUALATIN-9_ocr.pdf: 16414934 bytes, checksum: 8ee07290701bbb163a331a4a183f5809 (MD5) Previous issue date: 1995-08

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