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