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- soil treatment 1
- Soil type 1
- Soil use 2
- Soil water conservation 1
- Soil water content 1
- Soil-P retention capacity 1
- soil-structure interaction 1
- soilborne pathogen 1
- Soils 5
- soils 2
- Soils -- Analysis 3
- Soils -- Analysis -- Methodology 1
- Soils -- Classification 2
- Soils -- Herbicide content 2
- Soils -- Oregon 2
- Soils -- Oregon -- Douglas County 1
- Soils -- Oregon -- Jefferson County 1
- Soils -- Oregon -- Marion County 1
- Soils -- Oregon -- Prineville Reservoir Region 1
- Soils -- Oregon -- Willamette River Valley 6