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Show Tooaceo Impoverishes Son. It has been calculated that a ton A tobacco vltbdraws more than a htn dredweljfht of mineral conratuenti from an acre of land. This would appear ap-pear to be an astounding waste of material, ma-terial, which must be of enormous value to the soil, considering that TB per cent consists of calcium and potassium potas-sium salts .ind 15 per cent of magnesium mag-nesium and sodlu.ii salts, Including nearly 5 per cent f the essential con-fttitttent con-fttitttent to all plant phosphoric adl |