Tree establishment and installation | 90 | Structural decay and compartmentalization | 77 |
Tree identification | 89 | Landscape design | 71 |
Pruning | 88 | Herbicide and pesticide safety | 71 |
Tree selection | 87 | Tree preservation during construction | 69 |
Tree nutrition and fertilization | 86 | Tree benefits | 68 |
Plant insect and disease identification | 82 | Trees, people, and ecology | 67 |
Tree, soil, and water relationships | 82 | ANSI A300 standards | 67 |
Tree anatomy and physiology | 81 | Tree condition and risk management | 66 |
| | Safe work practices | 64 |
| | ZI33.1 standards | 62 |