Table 3 Effect of single and combined applications of RSB and NPK mineral fertilizers on soil organic matter and bulk density
| Â | Summer season (maize) | Winter season (wheat) | |||||||
|---|---|---|---|---|---|---|---|---|---|
Sum of squares | df | Mean square | F | Sig | Sum of squares | Mean square | F | Sig | |
Soil organic matter | |||||||||
Between groups | 213.008 | 5 | 42.602 | 93.693 |  < 0.001 | 305.163 | 61.033 | 109.670 |  < 0.001 |
Within groups | 5.456 | 12 | 0.455 | Â | Â | 6.678 | 0.557 | Â | Â |
Total | 218.464 | 17 | Â | Â | Â | 311.841 | Â | Â | Â |
Soil bulk density | |||||||||
Between groups | 0.084 | 5 | 0.017 | 6.275 | 0.004 | 0.107 | 0.021 | 8.228 | 0.001 |
Within groups | 0.032 | 12 | 0.003 | Â | Â | 0.031 | 0.003 | Â | Â |
Total | 0.116 | 17 | Â | Â | Â | 0.139 | Â | Â | Â |