|Soil Class||Soil Productivity Index|
*The figures in this table numerically express the soil productivity for each class of soil. Compiled by the Maryland Agricultural Statistics Services, USDA, and the Agricultural Resource Economics Department, University of Maryland, they are based on the capability each class has of producing crops under average management. Class I soils have a high productivity rating. Class II soils have a medium productivity rating which is 28 percent less than Class I. Class III and IV soils have a low productivity rating which is 50 percent less than Class I. Class V and VI soils have the lowest rating which is 82 percent less than Class I.