Dahsala system
The dahsala system (دہ سالہ, dah-sāla, ; dah-SAH-lə; literally "ten years") was a Mughal land-revenue assessment used across the central provinces of the empire from 1580. Devised by Akbar's chief revenue minister Raja Todar Mal, the system fixed the state's annual cash demand on cultivated land by averaging the recorded yields and prices of staple crops over a preceding ten-year period.