questions: asking about the components required for cultivation of button mushroom 
 answers: the straw is chopped into pieces 5cm. a minimum 3 quintal straw is used. urea mix is blended with the straw, wash the compost yard with 2% formalin.spread the straw up to 9''-12''.pour water for soaking of straw and leave for 24 hrs. bran and urea is mixed.water is sprinkled to make it moist.leave the heap as such for 24 hrs.break the  heap,loosen the straw for exchange of air and resack.