OCR Text |
Show Tobacco Impoverishes Son. It has been calculated that a ton ot tobacco withdraws more than a hundredweight hun-dredweight of mineral continents from an acre of land. TtHs would appear ap-pear to be an astounding waste of material, ma-terial, which must be of enormous rnlue to the aolL considering that 75 per cent consists of calcium and potassium potas-sium salts and X8 per cent of magnesium mag-nesium and aodluai salts. Including nearly 5 per cent of the essential con- atltuent to all plants phosphoric acH |