agricultural timeline By jce4830 9500 BCE beginning of agriculture this is where we started switching from hunting and gathering to farming Period: 9500 BCE to Feb 5, 2020 agricultural timeline 1619 First African slaves brought to Virginia 1701 Jethro Tull Invented the First Horse Drawn Seed Drill 1789 Iron Plow is First Seen 1793 Eli Whitney Invented the Cotton Gin 1834 Cyrus McCormick Invented the Grain Reaper 1850 Edmond Quincy Invented the Corn Picker 1874 Joesph Glidden invented barbed wire 1878 Anna Baldwin Invented the Milking Machine 1904 Ben Holt Invented the "Track Type" Tractor