| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| what is the humus layer of soil | 0.58 | 0.5 | 6040 | 73 |
| what is the humus layer of soil made of | 0.78 | 0.1 | 2426 | 78 |
| humus layer of soil | 1.38 | 0.2 | 1045 | 50 |
| which layer of soil has the most humus | 1.82 | 0.7 | 8590 | 85 |
| which soil layer contains the most humus | 0.89 | 0.4 | 3739 | 44 |
| which soil layer is rich in humus | 1.82 | 0.8 | 4140 | 49 |
| humus is found in which layer of soil | 1.87 | 0.5 | 1268 | 46 |
| what is humus made of soil | 1.58 | 0.7 | 987 | 8 |
| is humus the top layer of soil | 1.77 | 0.9 | 4189 | 79 |
| humus in soil layer | 0.03 | 0.3 | 3249 | 36 |
| how is humus soil made | 1.06 | 0.5 | 4433 | 66 |
| which type of soil contains humus | 1.27 | 1 | 2741 | 58 |
| what is humus soil | 1.55 | 1 | 6845 | 53 |
| what is humus in soil simple | 0.43 | 0.7 | 4016 | 97 |
| what produces the humus in soil | 0.85 | 0.7 | 9790 | 62 |
| how is humus formed in the soil | 0.12 | 0.8 | 2988 | 48 |
| humus content of soil | 0.1 | 0.6 | 6043 | 63 |
| definition of humus soil | 0.03 | 0.7 | 4363 | 10 |
