Subject
- Fruit trees -- Diseases and pests -- Control15
- Spraying and dusting in agriculture15
- Nut trees -- Diseases and pests -- Control14
- Berries -- Weed control4
- Fruit trees4
- Fruit trees -- Oregon4
- Fruit trees -- Weed control4
- Herbicides4
- Nut trees -- Oregon4
- Orchards -- Weed control4
- Plant hormones4
- Weeds -- Control4
- Fruit trees -- Pruning3
- Herbicides -- Research3
- Trees -- Propagation3
- Weeds -- Control -- Research3
- Fruit trees -- Abstracts2
- Fruit trees -- Weed control -- Oregon2
- Fruit trees -- Wounds and injuries2
- Fruit-culture -- Oregon -- Abstracts2