- Soft wheat -- Varieties -- Northwest, Pacific3
- Winter wheat -- Varieties -- Northwest, Pacific3
- Acid soils -- Oregon1
- Crop residue management -- Oregon, Western1
- Echium plantagineum -- Control -- Northwest, Pacific1
- Echium plantagineum -- Northwest, Pacific1
- Grasses -- Residues -- Oregon, Western -- Management1
- Grasses -- Seeds -- Oregon, Western -- Production (Biology)1
- Herbicide-resistant crops -- Northwest, Pacific1
- Herbicides -- Oregon1
- Liming of soils -- Oregon1
- Mints (Plants) -- Weed control -- Oregon1
- Nitrogen fertilizers -- Environmental aspects -- Oregon1
- Peppermint -- Fertilizers -- Oregon, Western1
- Peppermint -- Nutrition -- Oregon, Western1
- Polygonum -- Control1
- Scotch broom -- Control -- Northwest, Pacific1
- Scotch broom -- Northwest, Pacific1
- Soft wheat -- Disease and pest resistance -- Northwest, Pacific1
- Soft wheat -- Varieties -- Oregon, Eastern1