U.S. States U.S. Counties 4 Ecoregions - 25 Variables - Random Colors 4 Ecoregions - 25 Variables - Similarity Colors 6 Ecoregions - 25 Variables - Random Colors 6 Ecoregions - 25 Variables - Similarity Colors 8 Ecoregions - 25 Variables - Random Colors 8 Ecoregions - 25 Variables - Similarity Colors 10 Ecoregions - 25 Variables - Random Colors 10 Ecoregions - 25 Variables - Similarity Colors 25 Ecoregions - 25 Variables - Random Colors 25 Ecoregions - 25 Variables - Similarity Colors 50 Ecoregions - 25 Variables - Random Colors 50 Ecoregions - 25 Variables - Similarity Colors 75 Ecoregions - 25 Variables - Random Colors 75 Ecoregions - 25 Variables - Similarity Colors 100 Ecoregions - 25 Variables - Random Colors 100 Ecoregions - 25 Variables - Similarity Colors 200 Ecoregions - 25 Variables - Random Colors 200 Ecoregions - 25 Variables - Similarity Colors 300 Ecoregions - 25 Variables - Random Colors 500 Ecoregions - 25 Variables - Random Colors 500 Ecoregions - 25 Variables - Similarity Colors 600 Ecoregions - 25 Variables - Random Colors 700 Ecoregions - 25 Variables - Random Colors 800 Ecoregions - 25 Variables - Random Colors 800 Ecoregions - 25 Variables - Similarity Colors 1000 Ecoregions - 25 Variables - Random Colors 1000 Ecoregions - 25 Variables - Similarity Colors 1500 Ecoregions - 25 Variables - Random Colors 1500 Ecoregions - 25 Variables - Similarity Colors 2000 Ecoregions - 25 Variables - Random Colors 2000 Ecoregions - 25 Variables - Similarity Colors 5000 Ecoregions - 25 Variables - Random Colors 5000 Ecoregions - 25 Variables - Similarity Colors Input Layer - 25 Variables - Maximum Annual Temperature Input Layer - 25 Variables - Mean Annual Temperature Input Layer - 25 Variables - Minimum Annual Temperature Input Layer - 25 Variables - Number of Frost-Free Days Input Layer - 25 Variables - Mean January Precipitation Input Layer - 25 Variables - Mean February Precipitation Input Layer - 25 Variables - Mean March Precipitation Input Layer - 25 Variables - Mean April Precipitation Input Layer - 25 Variables - Mean May Precipitation Input Layer - 25 Variables - Mean June Precipitation Input Layer - 25 Variables - Mean July Precipitation Input Layer - 25 Variables - Mean August Precipitation Input Layer - 25 Variables - Mean September Precipitation Input Layer - 25 Variables - Mean October Precipitation Input Layer - 25 Variables - Mean November Precipitation Input Layer - 25 Variables - Mean December Precipitation Input Layer - 25 Variables - Depth of Mineral Soil Input Layer - 25 Variables - Soil Bulk Density Input Layer - 25 Variables - Mean Annual Solar Aspect Input Layer - 25 Variables - Mean Annual Solar Insolation 3000 Ecoregions - Elevation and Soil - Similarity Colors 3000 Ecoregions - Elevation and Soil - Random Colors 3000 Ecoregions - Elevation, Soil, Climate - Similarity Colors 3000 Ecoregions - Elevation, Soil, Climate - Random Colors Input Layer - 9 & 25 Variables - Available Water Content Input Layer - 9 & 25 Variables - Growing Degree Days Input Layer - 9 & 25 Variables - Non-growing Degree Days Input Layer - 9 & 25 Variables - Elevation Input Layer - 9 & 25 Variables - Soil Nitrogen Input Layer - 9 & 25 Variables - Soil Organic Matter Input Layer - 9 & 25 Variables - Growing Season Precipitation Input Layer - 9 & 25 Variables - Growing Season Solar Insolation Input Layer - 9 & 25 Variables - Depth to Water Table Expert-Derived Ecoregions - Bailey's Aggregated Ecoregions Expert-Derived Ecoregions - Bailey's Level II Ecoregions Expert-Derived Ecoregions - Kuchler's Vegetative Form Ecoregions Expert-Derived Ecoregions - Kuchler's Vegetative Type Ecoregions Expert-Derived Ecoregions - USDA-NRCS Major Land Resource Areas Additional Layers - Hydrologic Unit Codes (HUCs) Additional Layers - HYDRO1K Flow Direction Grid (Aspect)

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