By 1900 the ox yoke is becoming obsolete in Hadley and many other places. I say this because by the turn of the 20th century their production seized because the farmers could make more money using tractors than horses. This is because tractors could help produce more crops. Also, animals could tire out easily from the hard work, but machines couldn't. All they needed was gas! It made work 10 times faster. So, all the farmers did what you'd probably do, switch! Therefore the existence of harnessing equipment slowly disappeared.