Major Land Resource Area (MLRA)

Interactive MLRA Map (1997) and Narrative (1981)

MLRA Geographic Database

MLRA  (1997) geographic database (GIS ready)

Agricultural Handbook 296

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Land Resource Regions and Major Land Resource Areas of the United States (642 KB)

Definition of Terms

LRR, MLRA, LRU, CRA

Standards for MLRA Revision

National Soil Survey Handbook Part 649

MLRA Revision Through Aggregation of Statsgo (MARTHA'S)

Center for International Earth Science Information Network (CIESIN)

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MARTHA'S User Manual (4.1 MB)

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