OCR Text |
Show BlackAlkall. Investigations have been made of the almost complete loss of fertility of from 40,000 to 60,000 acres In the Sun Luis valley of Colorado, and this condition con-dition Is attributed to the so-called "bluck alkali," composed largely 'of sodium carbonate. This carbonate Is carried In the waters of the valley, Including In-cluding the rivers and the artesian wells, and the practice of sublrrlgatlon has brought It to the surface by capillarity and evaporation. It Is suggested sug-gested that the remedy lies In a eon-version eon-version of the carbonates Into sulphates sul-phates by the use of a liberal amount of gypsum about nine pounds of gypsum gyp-sum to one pound of black alkali and downward washing by means of surface Irrigation with furrows or by flooding. |