Seven Keys to Healthy Soil |
| 1. Soil Atmosphere - Porous soil spacing |
| 2. Water (moisture) - film envelopes percolation |
| 3. Minerals - nutrients - soil solutions - pH |
| 4. Organic Material - humus and humus reserves |
| 5. Beneficial Micro-organisms - & soil animals |
| 6. Soil Enzymes - are crucial to all life |
| 7. Lack of Interfering substances - & actions |