production room with a temperature of 20 to 25 ◦C and moisture content of 85 to 90 %.
When a complete colonization of the composts with mycelium was achieved, pasteurized peat from Bolu Yenic¸ag, Turkey was added as a surface layer (4 cm), to promote mushroom formation.
A few days later the room temperature was decreased to 16 to 18 ◦C and two weeks later the ventilation of the room was increased.
During the whole run of the experiment, cultural and technical procedures were applied according to the instructions of Erkel (1993).