Full TGIF Record # 87134
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Web URL(s):http://www.tandfonline.com/doi/pdf/10.1080/1065657X.2003.10702117
    Last checked: 10/01/2015
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Author(s):Brewer, Linda J.; Sullivan, Dan M.
Author Affiliation:Department of Crop and Soil Science, Oregon State University, Corvallis, Oregon
Title:Maturity and stability evaluation of composted yard trimmings
Section:Special focus: Compost maturity
Other records with the "Special focus: Compost maturity" Section
Source:Compost Science & Utilization. Vol. 11, No. 2, Spring 2003, p. 96-112.
# of Pages:17
Publishing Information:Emmaus, PA: JG Press
Keywords:TIC Keywords: Composts; Composting; Compost maturity; Yard waste; Analytical methods; Soil microorganisms; Respiration
Abstract/Contents:"The objective of this research was to evaluate a variety of stability and maturity indices for yard trimmings compost produced in the Puget Sound region of western Washington State. Compost samples were collected periodically during a 133-d composting cycle at a commercial composting facility, showing that indices of compost respiration rate were sensitive indicators of compost quality. All respiration rate indices identified a period of high respiration rates during active composting (first 27 d), and a period of relatively stable respiration rates during the latter part of curing (70 to 133 d). Chemical tests of compost solids showed less promise as maturity indicators, but provided valuable information on final compost quality. Mature yard trimmings compost had a C:N of 12, an NH4-N to NO3-N ratio of less than 4, a cation exchange capacity (CEC) of 400 cmol per kg of compost-C, and a pH between 6.5 and 7.0. Seed germination tests and sensory tests (color and odor) were of limited value in assessing compost maturity. Fully-cured compost produced with forced aeration had a Solvita CO2 test value of 6 to 7 and a respiration rate via the alkaline trap method of 2 mg CO2-C g compost-C-1 d-1. It reheated less than 2°C in an insulated Dewar flask in a 7 d incubation. Further evaluation and calibration of respiration test protocols for compost quality assurance testing programs are recommended."
See Also:Other items relating to: COMEVA
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Brewer, L. J., and D. M. Sullivan. 2003. Maturity and stability evaluation of composted yard trimmings. Compost Sci. Util. 11(2):p. 96-112.
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    Last checked: 10/01/2015
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    Access conditions: Item is within a limited-access website
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MSU catalog number: TD 796.5 .C584
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