Research Article
Low-Intensity Wildfire Alters Selected Soil Properties in the Tropical Shorea robusta Forest
Table 1
Classification of soil fertility parameters by NARC.
| Soil parameter | Very low | Low | Medium | High | Very high |
| SOM (%) | <1 | 1–2.5 | 2.5–5 | 5–10 | >10 |
| Total N (%) | <0.050 | 0.05–0.1 | 0.1–0.2 | 0.2–0.4 | >0.4 |
| Available P | <10 | 10–30 | 30–55 | 55–110 | >110 |
| Available K | <55 | 55–110 | 110–280 | 280–500 | >500 | Highly acidic | Acidic | Slightly acidic | Neutral | Alkaline |
| Soil pH | <4.5 | 4.5–5.5 | 5.5–6.5 | 6.5–7.5 | >7.5 |
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