Farmland Class

This layer classifies soils types by farmland importance. Important farmlands consist of prime farmland, unique farmland, and farmland of statewide or local importance. Within these classifications, limitations to farmland importance may be noted. See Prime Farmlands Definitions for further information.

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Soil Taxonomy Order (Dominant Condition)

The most general level of classification in the USDA system of Soil Taxonomy is the Soil Order. Soil orders are frequently defined by a single dominant characteristic affecting soils in that location, e.g., the prevalent vegetation, the type of parent material, or the climate variables such as lack of precipitation or the presence of permafrost. Also significant in several soil orders is the amount of physical and chemical weathering present, and/or the relative amount of soil profile development that has taken place.

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Soil Loss Tolerance (Dominant Condition)

Soil loss tolerance for a specific soil, also known as the T value, is the maximum average annual soil loss expressed as tons per acre per year that will permit current production levels to be maintained economically and indefinitely. T values range from 1 to 5 tons per acre per year.

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