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1830
About 250-300 labor-hours required to produce 100 bushels (5 acres) of wheat with walking plow, brush harrow, hand broadcast of seed, sickle, and flail -
1840s
Factory-made agricultural machinery increases farmers' need for cash and encourages commercial farming -
About 75-90 labor-hours required to produce 100 bushels (2 ½ acres) of corn with walking plow, harrow, and hand planting
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1862-75
Change from hand power to horses characterizes the first American agricultural revolution -
1870s
Silos and deep-well drilling come into use -
1880
William Deering puts 3,000 twine binders on the market -
1890s
Agriculture becomes increasingly mechanized and commercialized