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Abstract: Micro-silos were designed and built to study the effects of phase I compost formulation on odor production and mushroom yield. Three different poultry manure levels (zero poultry, standard poultry, double poultry) were used in compost formulations to determine if poultry manure influenced odor production. Air samples were taken for odor measurements twice during the phase I composting period (day 3 and day 6) for three replicate crops. Phase I compost odors were quantified by a trained odor panel. Odor intensity and pleasantness ratings were significantly different at day 3, however, neither the intensity nor the pleasantness was significantly different at day 6. The compost containing the highest amount of poultry manure had an overall significantly higher odor intensity rating than the zero poultry manure formula. The compost containing the high poultry manure levels also had a significantly higher overall odor unpleasantness rating than both the zero and the standard poultry manure formulas. Poultry manure formulation did influence mushroom yields by break, however, it had no significant effect on total yield.
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