Total chlorophyll content (pg cm−2) 90 and 130 days after budbreak (DABB) as affected by different planting hole backfill soils in the second year and third year of research on Quercus robur trees.
| Treatment | 2nd Year | 3rd year | ||
|---|---|---|---|---|
| Chlorophyll 90 DABB | Chlorophyll 130 DABB | Chlorophyll 90 DABB | Chlorophyll 130 DABB | |
| Compost | 14.90 b* | 13.08 b | 15.26 b | 13.79 bc |
| Fertilization | 17.13 a | 16.92 a | 18.09 a | 17.21 a |
| Leonardite | 14.92 b | 12.61 c | 14.54 b | 14.16 b |
| Control | 12.93 c | 12.27 c | 14.89 b | 12.81 c |
↵* Values differ significantly when followed by different letters at P ≤ 0.05 (LSD test); ns = not significant.