The first crop (CROP 1), Crop 1213, was designed to test the impact differentquantities of recycled casing mixed with fresh sphagnum peat would have on crop yield. The recycled casing material (RC) was mixed at different ratios with either fresh sphagnum peat moss (SP) or a black peat (BP) and applied to spawn run tubs to assessthe yield potential of the different mixes (Table 1). Six replicate tubs each holding 22.7 kg of spawn run compost were cased with the different treatments. The pH was measured for each casing mixture to determine if any pH adjustments were required. Each pH of the different mixes was determined to be within a standard pH range for a casing mixture. Each casing mixture also was sent to the Penn State Agricultural Analytical Lab for chemical analyses.
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