Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
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A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Soil index classes with indication of the acronym, level, descriptor by color, index value and required actions.
| Class n. | Acronym | Level | Descriptor | Index Value | Action |
|---|---|---|---|---|---|
| 0 | S0 | null | 0 | none | |
| 1 | S1 | very low | IS ≤ 0.4 | none | |
| 2 | S2 | low | 0.4 < IS ≤ 0.6 | none or some | |
| 3 | S3 | medium | 0.6 < IS ≤ 0.8 | some | |
| 4 | S4 | high | 0.8 < IS ≤ 1 | almost 2 | |
| 5 | S5 | very high | IS > 1 | more than 2 |
