United States Department of Agriculture
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LRR-MLRA-LRU Land Resource Hierarchy

Major Land Resource Area (MLRA) Land Resource Region (LRR) General Soil Map (State Soil Geographic Database-STATSGO) Detailed Soil Map (Soil Survey Geographic Database-SSURGO) Pedon Hierarchy reverse pyramid. Full description below.

The hierarchy is a reverse pyramid proceeding from most general at the top to most specific at the bottom. From top to bottom: Land Resource Region (LRR), Major Land Resource Area (MLRA), Land Resource Unit (LRU), STATSGO (General Soil Map), SSURGO (Detailed Soil Map), Components (Soil Series), Pedon.



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