Button mushroom is one of the largely growing mushrooms and has the good demand in the market and world trade too. By keeping this view in mind the study has been done "To increase the yield A. bisporus by comparative evolution mushroom strains" which are generally available with farmers so they can easily grow. To make the farmer's aware about the best strains for the cultivation of mushroom although most of the farmer's using especially for edible mushroom so little effort has been made "To innovate the farmer's about the effect of best strains on the growth, number of sporophores and yield...