a soil test indicates a pH below , the usual recommendation is for the application of ground limestone. In addition to having the ability to raise pH, limestone contains calcium. Some prefer dolomitic limestone because it contains both calcium and magnesium, however soils high in magnesium (serpentine) do not need more magnesium.
Calcium chloride and hydroxide 34, cement paste 35 and combined use of calcium salts as precipitant and polymeric aluminium hydroxide as coagulant have been studied for the fluoride removal by precipitation method. ... crushed limestone chips sample was used for the first