Extract: Farmland in Illinois is now assessed for property tax purposes on the basis of its value in current agricultural use. This value, commonly referred to as use-value, is based on the present value of the residual income accruing to the land from farm production. During the 1970s, the method of assessing farmland in Illinois underwent several changes. The 1981 amendment to the Illinois Farmland Assessment Law was the result of extensive legislative debate and compromise. The purpose of this circular is to present the administrative and technical aspects of Illinois' approach to farmland use-value assessment and to demonstrate the application of this method of assessment to a farm.