| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| what is humus made up of soil | 1.4 | 0.8 | 1603 | 20 |
| what is rich humus soil made up of | 1.23 | 0.9 | 2512 | 4 |
| how is humus soil made | 0.47 | 0.5 | 6480 | 54 |
| what is humus soil | 1.49 | 0.5 | 2759 | 35 |
| what is the humus layer of soil | 0.62 | 0.7 | 8092 | 45 |
| which type of soil contains humus | 1.21 | 0.6 | 4802 | 46 |
| how is humus formed in the soil | 1.69 | 0.3 | 7407 | 83 |
| humus content of soil | 1.34 | 0.7 | 5217 | 29 |
| definition of humus soil | 1.04 | 0.9 | 9694 | 86 |
| what produces the humus in soil | 1.78 | 0.2 | 1237 | 49 |
| humus in soil layer | 1.74 | 0.7 | 5884 | 71 |
