When did the traditional walking plough in China basically take shape?

Ladder plough is a traditional agricultural tool in agricultural production, which is divided into wooden pear and iron pear. Wooden plows began in Shang Dynasty, and iron plows began in Warring States Period.

Step plough, equipped with iron share and plough mirror, is pulled by livestock or manpower, and cultivates 2-3 mu of farmland every day, with a depth of 4 inches. In the Han Dynasty in China, iron plows were widely used, and all plows were made of iron, so they were called all-iron plows, which were durable. The plow mouth is sharpened, and the angle is reduced to below 90 degrees, which is sharp and applicable; Standardized specifications, plowshares are divided into large, medium and small due to different needs, and their shapes are also different due to needs; Crown share, used for share in windy and sandy areas, is equipped with iron share crown to protect the share blade and can be replaced at any time; The share has a wall, and the plow is equipped with a plow wall, which is convenient for turning over the soil and ridging, and gets twice the result with half the effort.

Plow is the most representative production tool among the traditional agricultural tools in China. The development and progress of ploughing technology are closely related to the progress of productivity and the changes of social system.