How did slash-and-burn plowmen and oxen evolve?

1, the emergence of early agricultural production: the origin of agriculture in China can be traced back to about 10,000 years ago. China is the first country in the world to grow rice and millet. The main farming method of primitive agriculture is slash and burn. In order to find fertile land, people have to migrate frequently. With the emergence and wide use of scarifying tools, agricultural productivity has been improved. During the Shang and Zhou Dynasties, a small number of bronze farm tools appeared. People already know how to ditch water, weed and cultivate soil, make fertilizer from weeds, and control insects and pests. During the Western Zhou Dynasty, there were millet, rice, millet, millet, wheat, mulberry, hemp and so on, and most of the main crops in later generations were already available. People's life moves from frequent migration to settlement. The independent development of agriculture in China laid the foundation of ancient agricultural society in China.

2. Intensive traditional agriculture: During the Spring and Autumn Period and the Warring States Period, people began to use iron farm tools and Niu Geng, and gradually popularized them. Zhao popularized the "two cows and three people" combined plough in the Western Han Dynasty. Later, the plow wall appeared, which enabled the iron plow to turn the soil in the same direction. After the Han Dynasty, Niu Geng with iron plough became the main farming method of Chinese traditional agriculture.

During the Sui and Tang Dynasties, Qu Yuan Plough appeared in Jiangdong area. This plow is equipped with a plow body evaluation device, which can adjust the plow depth. During the Spring and Autumn Period and the Warring States Period, the advanced farming methods in the world were already being used. During the Western Han Dynasty, Zhao summarized and carried out the field substitution method, which was more advanced than the sowing method widely used at that time.

Till Wei, Jin, Southern and Northern Dynasties, plowing and harrowing technology was formed in the dry land in the north, and it was also adopted in the paddy field in the south, which is still in use today.

After the Song Dynasty, a stable rice-wheat rotation system was gradually formed in Jiangnan area, and a system of three crops a year was also formed in some places. The famous water conservancy projects in ancient China include Dujiangyan in the Warring States Period, Caoqu, Baiqu and Longshou Canal in the Han Dynasty. Agricultural irrigation tools created and improved by people include dumpers in Cao Wei period, tractors in Tang Dynasty, high-speed tractors in Song Dynasty and wind turbines in Ming and Qing Dynasties.