Farmland did OK during the 70s. Illinois is mostly corn/soybeans. Valuation change for Illinois farmland: 1971 ... 0.2% 1972 ... 7.3% 1973 ... 12.0% 1974 ... 33.6% 1975 ... 7.4% 1976 ... 25.5% 1977 ... 37.3% 1978 ... 11.5% 1979 ... 14.3% Add another 2-3% per year for net cash rent yield.