these varieties included norin wheat and yukara rice which were bred by japan in the s and successfully contributed to heavier yields of tropical wheat and rice an event called the green revolution because this was partly a product of revolutions in engineering technology and biotechnology it can also be described as the industrialization of agriculture which subsequently promoted the twentiethcentury agricultural revolution in the world s most industrialized nations because this revolution involves petroleumdependent agriculture flat topographical conditions have made an extremely important contribution to its progress