Soil Classification Based on pH

🧪 Soil Classification Based on pH

Soil Reaction Class	pH Range
Extremely acidic	< 4.5
Moderately acidic	4.5 – 5.5
Slightly acidic	5.5 – 6.5
Neutral	6.5 – 7.5
Slightly alkaline	7.5 – 8.5
Moderately alkaline	8.5 – 9.5
Extremely alkaline	> 9.5