“…Also they are used to determine the significant effect of each factor on the response factor by developing mathematical models and to find out the optimal conditions. RSM technique is used by many researchers ( [4], [18], [22], [33], [35], [37], [42], [44] & [51]) to optimize the drying effect of various dryers like fluidized bed dryers, on different agricultural products like Artemisia absinthium leaves, coriandrum sativum leaves, coroba slices, kefir powder, ganodermalucidium slices, green peas, olive leaves and soya bean, etc.…”