Subject
- Alien plants1
- Endemic plants1
- Fire ecology -- Oregon -- Willamette River Valley1
- Grassland ecology -- Oregon -- Willamette River Valley1
- Grassland plants -- Ecology -- Oregon -- Willamette River Valley1
- Grassland plants -- Effect of fires on -- Oregon -- Willamette River Valley1
- Habitat restoration1
- Native prairie1
- Native species1
- Nelson's checkermallow -- Effect of fires on -- Oregon -- Willamette River Valley1
- Nelson's checkermallow -- Effect of floods on -- Oregon -- Willamette River Valley1
- Oregon, Western1
- Prairie plants -- Fertilizers -- Oregon1
- Prairie plants -- Seeds -- Viability -- Oregon1
- Regeneration ecology1
- Restoration ecology1
- Seedling establishment1
- Seedlings -- Ecophysiology -- Oregon -- Willamette River Valley1
- Soils -- Nitrogen content -- Oregon1