Introduction.- History of Soil Studies.- Soil-Forming Factor.- Elevation Gradients in the Oregon Mountain Ranges.- General Soil Regions of Oregon.- Diagnostic Horizons and Taxonomic Structure of Oregon Soils.- Taxonomic Soil Regions.- Mollisols.- Inceptisols.- Aridisols.- Andisols.- Ultisols.- Alfisols.- Entisols, Vertisols, Spodosols, and Histosols.- Soil-Forming Processes.- Benchmark, Endemic, Rare, and Endangered Soils.- Land Use in Oregon.- Yields, Soil Conservation, and Production System.- Summary.
Introduction.- History of Soil Studies.- Soil-Forming Factor.- Elevation Gradients in the Oregon Mountain Ranges.- General Soil Regions of Oregon.- Diagnostic Horizons and Taxonomic Structure of Oregon Soils.- Taxonomic Soil Regions.- Mollisols.- Inceptisols.- Aridisols.- Andisols.- Ultisols.- Alfisols.- Entisols, Vertisols, Spodosols, and Histosols.- Soil-Forming Processes.- Benchmark, Endemic, Rare, and Endangered Soils.- Land Use in Oregon.- Yields, Soil Conservation, and Production System.- Summary.
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