Agriscience Invention By Christian_Reyes Jan 27, 1793 Cotton Gin Eli Whitney Jan 27, 1834 Grain Reaper Cyrus McCormick Jan 27, 1834 Seed Planter Henry Blair Jan 27, 1836 Cotton Planter Henry Blair Jan 27, 1837 Steel Moldboard Plow --- John Deere John Deere Jan 27, 1850 Corn Picker Edumnd Qunicy Jan 27, 1874 Barbed Wire Joseph Glidden Jan 27, 1878 Milking Machine Anna Baldwin Jan 27, 1879 Perishable Food Preservation Thomas Elkins Jan 27, 1890 Crop Rotations George Washington Carver Jan 27, 1904 Tractor Benjamin Holt Jan 27, 1987 Gene Gun John Sanford Jan 27, 1990 Robotic Milking Machine Jan 27, 1993 GPS Technology
