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Stream chemistry responses to four range management strategies in eastern Oregon.Author(s): A.R. Tiedemann; D.A. Higgins; T.M. Quigley; H.R. Sanderson
Source: Res. Pap. PNW-RP-413. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 9 p
Publication Series: Research Paper (RP)
Station: Pacific Northwest Research Station
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DescriptionResponses of stream chemistry parameters, nitrate-N (NO3-N), phosphate (PO4), calcium (Ca), magnesium (Mg), potassium (K), sodium (Na), and hydrogen ion activity (pH) were measured on 13 wildland watersheds managed at four different grazing strategies. Range management strategies tested were (A) no grazing, (B) grazing without control of livestock distribution (8.2 ha/AUM), (C) grazing with control of livestock distribution (7.7 ha/AUM), and (D) grazing with control of livestock distribution and cultural treatments to improve forage production (2.8 ha/AUM). Nitrate-N, PO4, Ca, Mg, K, and Na were significantly (p<0.001) related to average daily streamflow as a covariate in the analysis of variance. None of the stream chemistry characteristics measured were influenced by increasing intensity of grazing management.
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CitationTiedemann, A.R.; Higgins, D.A.; Quigley, T.M.; Sanderson, H.R. 1989. Stream chemistry responses to four range management strategies in eastern Oregon. Res. Pap. PNW-RP-413. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 9 p
KeywordsWater quality, forest streams, streamwater pollution
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