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Main Title Effects of forest fertilization with urea on major biological components of small cascade streams, Oregon /
Author Stay, F. S., ; Kotko, A. ; Malueg, K. W. ; Crouse, M. R. ; Dominguez, S. E.
Other Authors
Author Title of a Work
Katko, A.,
Malueg, K. W.,
Crouse, M. R.,
Dominguez, S. E.,
Austin, R. E.,
Stay, F. S.
CORP Author National Heart, Lung, and Blood Inst., Bethesda, MD.
Publisher Corvallis Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1979
Report Number EPA-600/3-79-099
Stock Number PB80-118797
OCLC Number 06023044
Subjects Urea as fertilizer. ; Forest soils--Fertilization--Oregon.
Additional Subjects Ecology ; Fertilizers ; Invertebrates ; Stream pollution ; Forestry ; Urea ; Concentration(Composition) ; Inorganic nitrates ; Nitrogen ; Ammonia ; Benthos ; Fishes ; Algae ; Mortality ; Bioassay ; Forest land ; Biomass ; Decomposition ; Oregon ; Bioindicators ; Water pollution effects(Animals) ; Water pollution effects(Plants)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EHAM  QH541.R3 EPA-, 600/3-, 79-099 Region 1 Library/Boston,MA 04/29/2016
EJBD ARCHIVE EPA-600/3-79-099 Headquarters Library/Washington,DC 05/06/2014
EJBD  EPA 600-3-79-099 Headquarters Library/Washington,DC 07/15/2014
ERAD  EPA 600/3-79-099 Region 9 Library/San Francisco,CA 10/22/2012
ESAD  EPA 600-3-79-099 Region 10 Library/Seattle,WA 06/10/2005
NTIS  PB80-118797 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation viii, 60 pages : illustrations, 1 map ; 28 cm.
During April, 1976, 1.9 x 10 ha of second growth Douglas fir, located in the Willamette National Forest of Oregon, were fertilized with 224 kg urea-N/ha. Unfertilized buffer strips of 60 and 90m were maintained along all second and third order streams, respectively. Sharp increases in urea concentrations (maximum of 12 mg/l) during the fertilization phase were due to the unintentional, direct application to the streams. Immediately following fertilization all nitrogen species returned to near background levels. The second year following fertilization only NO3-NO2 appeared to be slightly elevated due to fertilization. Two-month fish bioassays using Salmo gairdneri showed no mortalities which could be attributed to by-products or contaminants of urea. Algal assays using Selenastrum capricornutum, and chlorophyll a and ATP-biomass of periphyton from glass slide samplers showed low supporting capacity and generally no significant increase in biomass resulting from fertilization.
"This study was conducted in cooperation with U.S. Forest Service." "Freshwater Division, Corvallis Environmental Research Laboratory." "September 1979." Includes bibliographical references (pages 54-59).