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How Farm Machinery Changed Agriculture
A plain-language overview of how farming moved from hand tools to animal-drawn implements and then engine-driven machines, and what changed for farmers and food.
Tools and Industry
Farm Tools and Agriculture
How plows, harvesters and seed tools changed how people grow food.
Barbed Wire and the Fencing of Open Land
How barbed wire patents of the 1860s and 1870s, rival makers and a famous court fight made cheap fencing practical and changed ranching on the American plains.
Farm Tractors and the End of the Draft Horse
From steam traction engines to early gasoline tractors, how self-propelled power replaced horses and mules on farms and changed what land was used to grow.
The Combine Harvester Explained
How the combine harvester merged reaping, threshing and cleaning into a single machine, from 1830s Michigan prototypes to self-propelled models and modern harvests.
The Cotton Gin and Short-Staple Cotton
How the cotton gin mechanized seed removal from short-staple cotton in the 1790s, boosted cotton production and deepened slavery in the American South.
The Haber-Bosch Process and Synthetic Fertilizer
How Fritz Haber and Carl Bosch turned nitrogen from air into ammonia at industrial scale, and why synthetic fertilizer now underpins much of the world's food supply.
The Mechanical Reaper and the Grain Harvest
The 19th century reaper designs of Bell, Hussey and McCormick, the rival claims over who invented them, and how mechanical cutting changed grain harvest labor.
The Plow and Its Move to Steel Moldboards
From the simple scratch ard to heavy moldboard plows and John Deere's polished steel plow, how plow design adapted to heavy soils and opened prairie farmland.
The Seed Drill and Planting by Row
How mechanical seed placement replaced broadcast sowing, why credit for the seed drill is disputed, and what planting in rows meant for yields and weed control.
The Threshing Machine and Winnowing Grain
How separating grain from stalks moved from flails and winnowing baskets to Andrew Meikle's threshing machine, steam-powered threshers and unrest over lost winter work.
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