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1 <br /> SOIL AND PLANT LABORATORY, INC. <br /> i -2- <br /> CITY OF EVERETT ENVIRONMENTAL LAB <br /> November 7, 2003 <br /> Carbon/nitrogen ratio: On the basis of the dry matter bulk density (262 lbs. per cubic yard), total nitrogen <br /> (1.6%) and organic matter content (43.7%), the estimated carbon/nitrogen ratio is desirably low at about <br /> 15:1. This means that there is more than sufficient nitrogen present to provide for the nitrogen demands of <br /> microorganisms as they continue to degrade the carbon fraction. <br /> Use rate: On the basis of overall chemistry, this product can be safely used at a volume percentage equal <br /> to about 1/3 Nutrifibre / 2/3 mineral soil. For finer textured soils containing substantial silt and clay, the <br /> amount can be increased to about 40%Nutrifibre by volume. <br /> If a 2" layer of Nutrifibre is spread and rototilled into a 6"-8" depth, a substantial improvement in <br /> nitrogen and phosphorus availabilities will be expected in the final blend. A 2" layer of Nutrifibre will <br /> require 6 cubic yards per 1000 square feet or 260 cubic yards Nutrifibre per acre. <br /> Owing to the high level of ammonium nitrogen, it is suggested that the Nutrifibre be applied at least three <br /> to four weeks prior to planting, in order to allow soil microorganisms to convert ammonium nitrogen to <br /> the preferred nitrate form. Otherwise, you may experience ammonium toxicity on plant roots. <br /> A supplemental report will follow regarding our recent field call. In this regard, we will review the data <br /> for the bottom ash and Nutrifibre to determine appropriate top-dress rates for the existing Poplar <br /> plantation. <br /> If upon review of the above additional questions remain, please do not hesitate to contact the Bellevue <br /> office. <br /> Sincerely, <br /> DIRK W. MUNTEAN, M.A. <br /> DWM/dlb <br /> 73 <br />