1870- Silos came into use, Deep-well drilling first widely used
1874- Glidden Barbed Wire Patented
1880- William Deering put 3,000 twine binders on the market
1884-90- Horse-drawn combine used in Pacific Coast wheat areas
1890-95- Cream Separators came into wide use
1890-99- Average annual consumption of commercial fertilizer: 1,845,900 tons
1910-15- big open-geared gas tractors came into use in areas of extensive farming
1915-20- Enclosed gears developed for tractor
1918- Small prairie-type combine with auxiliary engine introduced
1926- Cotton-stripper developed for High Plains
1930's- All-purpose, rubber-tired tractor with complementary machinery came into wide use
1941-45- Frozen Foods popularized
1942- Spindle cotton picker produced commercially
1945-70- Change from horses to tractors
