1996				Commercial cultivation of genetically modified pla...
1972				Organic movement starts taking roots
1944				Green Revolution begins in Mexico
1939				DDT becomes a rage
1930				First plant patent is given
1930				First aerial photos for agriculture
1900				Birth of industrial agriculture
1892				First practical gasoline-powered tractor
1879				Milking machine replaces hand milking
1866				Gregor Mendel describes Mendelian inheritance