Subject
- Agriculture teachers -- Resignation -- United States1
- Agriculture teachers -- United States1
- Exponential functions -- Study and teaching (Higher)1
- Indicators (Biology)1
- Jointed goatgrass -- Control -- United States1
- Knowledge, Theory of1
- Labor turnover -- United States1
- Logarithmic functions -- Study and teaching (Higher)1
- Mathematical models -- Study and teaching (Higher)1
- Mathematics -- Study and teaching (Higher)1
- Plants -- Effect of herbicides on -- United States1
- Soil biology -- Oregon1
- Soil ecology -- Oregon1
- Soils -- Composition1
- Soils -- Quality1
- Winter wheat -- Weed control -- United States1
- Work and family -- United States1