Parent material chemical property - first (uppermost)
| Attribute Label | PMCHEM1 |
|---|---|
| Title | Parent material chemical property - first (uppermost) |
| Description | The chemical composition class of the upper layer parent material. |
| Classes | Parent Material Chemical Property: 8 classes. First used in SNT 2.0. Renamed from PMCHEM in SNT v1.0. |
| Code | Class | Description |
|---|---|---|
| UD | Undifferentiated | Undifferentiated acidity and/or calcareousness |
| EA | Extremely / Strongly Acidic | pH < 5.6 |
| AN | Medium Acid to Neutral | pH 5.6 - 7.4 |
| WC | Weakly Calcareous | < 6 CaCO3 equivalent (%) |
| VC | Moderately / Very Strongly Calcareous | 6 - 40 CaCO3 equivalent (%) |
| EC | Extremely Calcareous | > 40 CaCO3 equivalent (%) |
| SA | Calcareous and Saline | Calcareous and Saline |
| - | Not Applicable | Not Applicable |