"Phosphoric acid" Quotes from Famous Books
 ... soluble in dilute hydrochloric acid, is (with the exception of the alumina it may contain) composed of fertilising material. The substances found in the soluble inorganic matter of soils are lime, magnesia, alumina, silica, phosphoric acid, oxide of iron, oxide of manganese, potash and soda. The insoluble mineral matter is nearly all silica. There is very little clayey matter in any of the soils—not more than about five per cent. All the soils ...
— A start in life • C. F. Dowsett
... in soils which are essential for plant growth include water, potash, lime, magnesia, nitrates, sulphur, and phosphoric acid—all of which are subordinate in amount to the common products of weathering (pp. 20-22, 23-24). Of these constituents magnesia is almost invariably present in sufficient quantity; while potash, nitrates, ...
— The Economic Aspect of Geology • C. K. Leith |
