“Soil Potential Index (SPI)” means the official United States Department of Agriculture, Natural Resources Conservation Service measure of soil productivity under standard conditions as adjusted by the cost of overcoming soil limitations plus any continuing limitations not practical to overcome.

Source. #7463, eff 3-21-01, EXPIRED: 3-21-09 New. #13910, eff 3-21-24 (see Revision Note at chapter heading for Agr 700) New. #13910, eff 3-21-24 (see Revision Note at chapter heading for Agr 700)