Substrate, Casing Supplementation and Fragmentation have no Effect on Button Mushroom Yield under Appropriate Conditions

It is generally believed that mushroom production declines rapidly after the 2^nd flush because specific nutrients are depleted from the compost. New mycelium, formed after fragmentation, is able to utilize additional nutrients in the compost that were not accessible in the 1^st crop. This experiment was conducted to test fragmentation and supplementation effects on button mushroom (Agaricus bisporus Sing). Supplementation was addition of 0 or 40 g of soybean meal and rice bran to the substrate and casing soil. Supplementation and fragmentation had no beneficial effects than current production procedures are not recommended for use.