| Crop residue | Sum of ranks | Mean of ranks | (Chi2, df, p-value) | |
| Mayuge | Sugar cane tops | 2647.00 | 64.56a | X2 = 54.40df = 4p = 0.0001 |
| G.nut haulms | 3465.50 | 84.52ab | ||
| Banana peels | 3954.50 | 96.451ab | ||
| Sweet potato vines | 4810.00 | 117.32bc | ||
| Maize stover | 6238.00 | 152.15c | ||
| Jinja | G.nut haulms | 2790.00 | 69.75a | X2 = 25.83df = 4p = 0.0001 |
| Sugar cane tops | 3468.00 | 86.7ab | ||
| Banana peels | 4069.00 | 101.72abc | ||
| Sweet potato vines | 4866.00 | 121.65bc | ||
| Maize stover | 4907.00 | 122.67c | ||
| Buikwe | Sugar cane tops | 3616.50 | 80.37a | X2 = 54.71df = 4p = 0.0001 |
| Banana peels | 4020.00 | 89.33ab | ||
| G.nut haulms | 4608.00 | 102.4ab | ||
| Sweet potato vines | 5599.00 | 124.42b | ||
| Maize stover | 7581.50 | 168.48c |