ED YOUNG / AGSTOCKUSA / SCIENCE PHOTO LIBRARY ED YOUNG / AGSTOCKUSA / SCIENCE PHOTO LIBRARY
Mushroom harvest. Crop of edible mushrooms (Agaricus sp. ) being harvested in a grow-room. Mushrooms are cultivated commercially in caves, dark cellars or specially constructed grow-rooms in which humidity and temperature are controlled. Mushrooms are grown on beds of rotted manure and chemically treated straw over which a thin layer of soil is spread. They are picked at different stages of maturity to produce button, closed cap and flat mushrooms. Mushrooms are usually eaten cooked and are a good source of protein, carbohydrate and minerals.
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