The Green Revolution is a period of agricultural transformation that took place between the 1940s and 1960s. Characteristics of this revolution include a dramatic increase in global agriculture due to new advances, including chemical fertilizers and synthetic herbicides.
One of the most important developments of this time period was high-yield crops, which are crops designed to produce higher numbers of themselves than traditional crops. These crops, sometimes referred to as high-yielding varieties, generally include maize, wheat and rice. Another effect is that cereal production doubled between 1961 and 1985. The world population has increased by four billion since the time of the Green Revolution, which may be due to the suppression of widespread famine and increased production of food.