What is the fundamental reason to promote the development of ancient agricultural farming methods in China?

1, the dependence of feudal natural economy on agriculture-as a traditional country with agricultural civilization, farming and weaving are the foundation of the world, and food is the first thing for the people. 2. The rulers attach importance to agriculture-the policy of emphasizing agriculture and restraining business. 3. The development of astronomical science-the progress of calendar and its guidance to agricultural production. 4. Population multiplication-one of the criteria of feudal social progress is population multiplication and social stability.