|The second stage of cultivation
This surface is then covered by a thin (5 to 6 centimetres) layer of casing soil. This process is fully mechanized. Our casing soil is made up of 70 percent peat from managed peat bogs, 10 percent coal tailings and 20 percent spent lime. The casing soil we use is a special blend which reduces the amount of peat that is normally used on a mushroom farm. Spent lime is a waste product of the sugar refining industry. Special bacteria develop in casing soil, which are indispensable for mushroom growth but essentially it is used as a water resevoir for the mushroom crop. The mycelium grows from the compost into the casing soil and after seven days the casing soil will be fully colonized. In the first four to five days the casing is watered every day. In the last two to three days of this period, no fresh air is introduced. This allows the growing room to become very humid and warm. These conditions increase mycelium growth through the casing soil until it appears on the surface.
next > The formation of mushrooms
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