Sources of alkalinity Total soil alkalinity increases with: Weathering of silicate, aluminosilicate and carbonate minerals containing , , and ; Addition of silicate, aluminosilicate and carbonate minerals to soils; this may happen by deposition of material eroded elsewhere by wind or water, or by mixing of the soil with less weathered material (such as the addition of limestone to acid soils); Addition of water containing dissolved bicarbonates (as occurs when irrigating with high-bicarbonate waters).
Sources of alkalinity Total soil alkalinity increases with Weathering of silicate aluminosilicate and carbonate minerals containing   and ; Addition of silicate aluminosilicate and carbonate minerals to soils; this may happen by deposition of material eroded elsewhere by wind or water or by mixing of the soil with less weathered material (such as the addition of limestone to acid soils); Addition of water containing dissolved bicarbonates (as occurs when irrigating with high-bicarbonate waters)