Soil pH had three levels following the USDA criteria acidic < 6.5, neutral ¼ 6.6 to 7.3, alkaline > 7.4. Most studies used water as reagent for soil pH measurement.
Soil pH had three levels following the USDA criteria acidic < 6.5, neutral ¼ 6.6 to 7.3, alkaline > 7.4. Most studies used water as reagent for soil pH measurement.