| Fertilization levels | Direct effect | Residual effect | SEM | p |
Leaves | T0 | 8.11a | 11.54b | 0.172 | 0.0001 |
T1 | 8.65a | 15.41b | 0.199 | 0.0001 | |
T2 | 9.20a | 15.40b | 0.200 | 0.0001 | |
T3 | 8.69a | 18.23b | 0.101 | 0.0001 | |
T4 | 9.09a | 17.96b | 0.245 | 0.0001 | |
Stems | T0 | 10.13a | 10.77a | 0.233 | 0.270 |
T1 | 11.72a | 10.89a | 0.263 | 0.174 | |
T2 | 13.17a | 11.37a | 0.179 | 0.005 | |
T3 | 14.42a | 14.84a | 0.196 | 0.333 | |
T4 | 15.03a | 15.48a | 0.253 | 0.461 | |
Whole plants | T0 | 18.22a | 22.27b | 0.191 | 0.0001 |
T1 | 20.37a | 26.30b | 0.199 | 0.0001 | |
T2 | 22.37a | 26.77b | 0.206 | 0.0001 | |
T3 | 23.11a | 33.07b | 0.193 | 0.0001 | |
T4 | 24.12a | 33.44b | 0.300 | 0.0001 |