Evaluation
The two common types of Topsoil are Bulk and Bagged Topsoil. The following table illustrates major differences between the two.
| Topsoil Type | HM% | BS% | pH | P-I | K-I | Ca% | Mg% |
|---|---|---|---|---|---|---|---|
| Bulk | 0.3 | 69 | 5.2 | 009 | 026 | 45 | 10 |
| Bagged | 0.7 | 78 | 5.8 | 166+ | 178 | 56 | 12.3 |
When starting a gardening project, it is very crucial to check whether or not the Soil is satisfactory. Following are the desired levels of Topsoil nutrients.
| Category | Desired Results |
|---|---|
| pH Level | 5.8 to 6.2 |
| Phosphorus (P-I) | Index of 50 |
| Potassium (K-I) | Index of 50 |
| Calcium (Ca%) | 40-60% of Cation Exchange Capacity (CEC) |
| Magnesium (Mg%) | 8-10% of CEC |
| Base saturation (BS%) | 60-80% of CEC |
| Manganese (Mn-I) | Index > 25 |
| Zinc (Zn-I) | Index > 25 |
| Copper (Cu-I) | Index > 25 |
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