- Soils -- Testing4
- Alfalfa -- Fertilizers -- Oregon, Western2
- Soils -- Analysis2
- Soils -- Oregon -- Testing2
- Agrostis -- Fertilizers -- Oregon, Western1
- Beans -- Fertilizers -- Oregon, Western1
- Beets -- Fertilizers -- Oregon, Western1
- Cereal grasses -- Fertilizers -- Oregon, Eastern1
- Corn -- Fertilizers -- Oregon, Eastern1
- Crimson clover -- Fertilizers -- Oregon, Western1
- Fertilizers -- Oregon1
- Forage plants -- Fertilizers -- Oregon, Eastern1
- Grasses -- Fertilizers1
- Hazelnuts -- Oregon1
- Hazelnuts -- Soils -- Oregon, Western1
- Liming of soils -- Oregon, Western1
- Meadows -- Fertilizers -- Oregon, Eastern1
- Nitrogen1
- Onions1
- Orchard grass -- Fertilizers -- Oregon, Western1