Which type of agriculture is practiced by the largest percentage of the world's people?
A large percentage of agriculture is slash and burn agriculture. This is where the existing vegetation is burned before the planting of crops. In many unfertile areas, this method is the only proven method to grow productive crops.
The earliest cities developed as a result of agriculture. Agriculture allowed people to settle down and the population to grow and fit in a smaller area. Because a small percentage of people could grow enough food for the rest, the rest of the people could specialize in other tasks, such as construction, foreign trade, etc.