Table 2: The main effect of plant spacing and NP fertilizer rates on seed yield and yield components of Bombay Red onion variety grown at Shewa Robit.
| Spacing (cm) |
Umbel Diameter(cm) |
Number of Seeds Per Umbel |
Seed Weight Per Umbel(g) |
Seed Yield Per Plot(g) |
Seed Yield Per Hectare (kg) |
1000 Seed Weight (gm) |
| 10 x 20 x 40 |
6.144ab |
753.7b |
2.811c |
383.8b |
511.7c |
3.654a |
| 20 x 30 x 50 |
6.366a |
910.2a |
3.516a |
545.3a |
727.1ab |
3.694a |
| 10 x 40 |
5.656cd |
824.7ab |
3.243abc |
505.9ab |
674.1ab |
3.609a |
| 10 x 50 |
5.975bc |
904.1a |
3.333ab |
463.2ab |
612.3bc |
3.689a |
| 10 x 30 |
5.533d |
795.3b |
2.954bc |
561.7a |
748.9a |
3.685a |
| LSD (5%) |
0.3745 |
93.1 |
0.4756 |
98.6 |
130.8 |
ns |
| Fertilizer rate (P2O5 and N kg ha-1) |
| 0 x 0 |
5.734b |
820.1bc |
2.899b |
281.3d |
375.0c |
3.529b |
| 86.25 x 85.5 |
5.809b |
756.1c |
2.984b |
374.8cd |
499.8c |
3.697ab |
| 115 x 114 |
6.267a |
914.6a |
3.293ab |
663.6a |
879.4a |
3.634ab |
| 143.6 x 142.5 |
6.045ab |
895.0ab |
3.636a |
640.7ab |
853.8a |
3.873a |
| 69 x 142 |
5.818b |
802.2bc |
3.046b |
499.5bc |
666.1b |
3.598ab |
| LSD (5%) |
0.3745 |
93.1 |
0.4756 |
98.6 |
130.8 |
0.2021 |
| CV (%) |
8.6 |
15.1 |
20.4 |
27.3 |
27.2 |
3.529b |
LSD (5%) = Least Significant Difference at P=0.05, CV (%) = Coefficient of Variation ns= non-significant. Means in columns with the same letter(s) in each treatment are not significantly different.