Annual costs for materials, equipment, and labor, and growth and efficiency per tree for water control (NULL), commercial biological product (CBP), aerated compost tea (ACT), NPK fertilizer (FERT), compost (COMP), and wood-chip mulch (WC).
| Treatment | NULL | CBP | ACT | FERT | COMP | WC |
|---|---|---|---|---|---|---|
| Materials ($ tree−1) | 0.0 | 3.5 | 7.5 | 6.5 | 3.0 | 10.0 |
| Equipment ($ tree−1) | 0.5 | 3.5 | 28.5 | 3.5 | 1.0 | 1.0 |
| Labor ($ tree−1) | 7.5 | 11.3 | 30.0 | 11.3 | 15.0 | 15.0 |
| Total cost ($ tree−1) | 8.0 | 18.3 | 66.0 | 21.3 | 19.0 | 26.0 |
| Growth (g tree−1) | 22.8 | 23.9 | 24.1 | 38.7 | 41.5 | 61.3 |
| Efficiency ($ g−1) | 0.35 | 0.77 | 2.74 | 0.55 | 0.46 | 0.42 |