LRR-MLRA-LRU Land Resource Hierarchy
![Hierarchy reverse pyramid. Full description below.](https://webarchive.library.unt.edu/eot2008/20090115184652im_/http://soils.usda.gov/survey/geography/images/hierarch_20.jpg)
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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