7° 
Modern Business Geography 
Internaitonas Harvester companiy 
figs. 14, 15. Fields were plowed a furrow at a time from before the dawn of history to the 
second half of the nineteenth century, when the gang plow was invented. In a few out-of-the- 
way corners of the earth the most primitive kind of plowing may still be seen, as in Turkestan, 
where a plow that is little more than a bent and sharpened stick is pulled by a pair of small, 
long-haired vaks.