Actual and changes in Mn concentrations (from month 0) in leaf 1 of coconut palms that were treated with manganese sulfate via soil application, petiole injection, or trunk injection. Means with different letters following are statistically different at the P = 0.05 level based on the Waller-Duncan k-ratio method. (n = 10)
| Treatment | Actual Mn concentration (ppm) | Change in Mn concentration (ppm) | |||||
|---|---|---|---|---|---|---|---|
| Month 0 | Month 1 | Month 3 | Month 6 | Month 1 | Month 3 | Month 6 | |
| 1: Control (no Mn) | 118.5 | 116.4 b | 89.8 b | 69.6 b | 2.1 b | −28.7 b | −48.9 b |
| 2: Soil application | 128.6 | 145.7 ab | 97.5 b | 73.4 b | 17.2 b | −31.1 b | −53.2 b |
| 3: Petiole injections (4) | 143.1 | 145.9 ab | 125.6 b | 86.6 ab | 2.8 b | −17.5 b | −56.5 b |
| 4: Petiole injection (1) | 112.6 | 110.5 b | 84.9 b | 63.6 b | −2.1 b | −27.7 b | −49.0 b |
| 5: Trunk injection | 89.8 | 191.8 a | 203.2 a | 113.3 a | 101.9 a | 113.4 a | 23.5 a |
| P-value | 0.088 | 0.0254 | 0.0002 | 0.033 | <0.0001 | <0.0001 | <0.0001 |