Agri Science History Timeline By Seth Watts Jan 1, 1793 Cotton Gin, Eli Whitney Eli Whitney Jan 1, 1834 Grain Reaper, Cyrus McCormick Sep 6, 1834 Seed Planter, Henry Blair Sep 6, 1836 Cotton Planter, Henry Blair Sep 6, 1837 Steel Moldboard Plow, John Deere Sep 6, 1850 Corn Picker, Edmund Quincy Sep 6, 1874 Barbed Wire, Joseph Glidden Sep 6, 1878 Milking Machine, Anna Baldwin Sep 6, 1904 Tractor, Ben Holt Sep 12, 1917 Smith Hughes Act Sep 12, 1928 FFA became national organization Sep 12, 1930 Creed Adopted Sep 12, 1950 FFA recieved federal charter Sep 12, 1965 FFA and NFA merged Sep 12, 1969 Girls were allowed in the FFA Sep 6, 1987 Gene Gun, John Sanford Sep 12, 1988 Name Change Sep 6, 1993 GPS Technology Sep 6, 1998 Robotic Milking Machine