Archeological surveys also showed some problems associated with the various systems of revenue assessment and collection in Mughal era. Crop rates at the begining of Mughal Emperor Akbar's reign had been fixed arbitrarily. They became more realistic afterwards, varying with localities and ultimately came to be framed on the basis of the average yield worked out separately for each locality. Land revenue was later fixed in cash, not kind. Quite unlikely the prices forming the basis for changing the demand into cash were identical with those at which the peasant parted with his crop at the time of the harvest, when there was a glut in the market . Outside these provinces conditions varied considerably during the reign of Mughal Emperors.