Classification of Soil PH Ranges
The United States Department of Agriculture Natural Resources Conservation Service, formerly Soil Conservation Service classifies soil pH ranges as follows:
| Denomination | pH range |
|---|---|
| Ultra acid | < 3.5 |
| Extreme acid | 3.5–4.4 |
| Very strong acid | 4.5–5.0 |
| Strong acid | 5.1–5.5 |
| Moderate acid | 5.6–6.0 |
| Slight acid | 6.1–6.5 |
| Neutral | 6.6–7.3 |
| Slightly alkaline | 7.4–7.8 |
| Moderately alkaline | 7.9–8.4 |
| Strongly alkaline | 8.5–9.0 |
| Very strongly alkaline | > 9.0 |
Read more about this topic: Soil PH
Famous quotes containing the word soil:
“Ah! never shall the land forget
How gushed the life-blood of her brave—
Gushed, warm with hope and courage yet,
Upon the soil they fought to save.”
—William Cullen Bryant (1794–1878)
Related Phrases
Related Words