Full TGIF Record # 125179
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Web URL(s):http://www.tandfonline.com/doi/pdf/10.1080/1065657X.2007.10702320
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Author(s):Bowden, C.; Spargo, J.; Evanylo, G.
Author Affiliation:Bowden: United States Department of Agriculture - Argicultural Research Service, Environmental Management and By-Product Utilization Laboratory, Beltsville, Maryland; Spargo and Evanylo: Crop and Soil Sciences Department, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
Title:Mineralization and N fertilizer equivalent value of composts as assessed by tall fescue (Festuca arundinacea)
Other records with the "Research" Section
Source:Compost Science & Utilization. Vol. 15, No. 2, Spring 2007, p. 111-118.
Publishing Information:Emmaus, PA: JG Press
# of Pages:8
Related Web URL:http://www.tandfonline.com/doi/abs/10.1080/1065657X.2007.10702320
    Last checked: 10/26/2016
    Access conditions: Item is within a limited-access website
    Notes: Abstract
Keywords:TIC Keywords: Mineralization; Nitrogen fertilizers; Composts; Festuca arundinacea; Nitrogen availability; Bioindicators; Sewage sludge; Manures; Animal manures; Fertilization rates
Abstract/Contents:"The capability to determine nitrogen availability of composts is necessary to ensure that such materials will provide sufficient fertilization to the growing crop and cause minimal environmental degradation. A greenhouse study using tall fescue as a bioindicator was used to evaluate nitrogen availability of two biosolids composts, two mixed yard waste-poultry manure composts, and one commercially-processed poultry litter. Five inorganic nitrogen (as NH4NO3-N) treatments applied at 0, 22.5, 45, 67.7, and 90 mg N/kg soil were employed to establish an N calibration curve. Yield, fescue biomass total nitrogen (as total Kjeldahl N (TKN)), and soil TKN and KCl extractable NO3--N and NH4+-N concentrations of the organically amended treatments were compared to the inorganically fertilized treatments to determine amendment N mineralization rates and N fertilizer equivalent values (NFEV). Nitrogen mineralization rates were greatest in the poultry litter (21%) and Panorama yard waste compost (5%) amended pots. The NFEV of these amendments were 49% and 10%, respectively. Wolf Creek biosolids compost and Huck's Hen Blend yard waste compost immobilized N (-5% and 0.18%, respectively), and had percent NFEV of -0.66% and 0.19%, respectively. Rivanna biosolids compost immobilized N (-15%), but the NFEV was 30% due to the relatively high inorganic N content in the amendment. Nitrogen mineralization and NFEV were generally greater in amendments with greater total N concentrations and lower C:N values. The total N concentration and C:N values were less reliable variables in predicting N mineralization and percent NFEV when a significant portion of the total N was in the inorganic form. Nitrogen equivalency value and N mineralization for each amendment increased with time of sampling, indicating the potential for early season N insufficiency to plants fertilized with compost due to lack of synchrony between N mineralization and plant N needs."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bowden, C., J. Spargo, and G. Evanylo. 2007. Mineralization and N fertilizer equivalent value of composts as assessed by tall fescue (Festuca arundinacea). Compost Sci. Util. 15(2):p. 111-118.
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    Last checked: 10/01/2015
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MSU catalog number: TD 796.5 .C584
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