Oyster mushroom farming has been picking up in Katihar district for the past 3-4 years.The gestation period as well as critical input cost for oyster mushroom farming is less, compared to milky white and button mushrooms. Oyster mushrooms get ready for harvesting in 20-25 days. The oyster mushroom is sold at Rs200/kg while milky white mushroom is available at Rs300/kg and button mushroom at Rs150-200/kg.

Mushroom farming is also good for landless people as well as residue crop management, besides, keeping the ECOLOGY and Environment safe. The burning

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of crops residue such as stubble of maize, wheat and paddy causes ENVIRONMENT POLLUTION. But, stubbles are used in the mushroom farming.