Solution:In Mughal India, all temporary and circumstantial taxes and impositions levied by the government over and above regular taxes were called Abwabs.
Land tax was assessed by Todar Mal after a field-to-field survey.
During the nawab period, a variety of abwabs were imposed on ZAMINDARS, who conveniently transferred them onto their raiyats. The practice of collecting abwabs began to decline from the 1920s.