What are the main aspects of China's ancient farming technology?

China in ancient times has always attached importance to agricultural production, had created a brilliant Chinese civilization, and the progress of intensive farming technology, in which played an important role? Tillage technology refers to the farming method that adopts various means and invests a lot of manpower and material resources in order to obtain the maximum output?

Ancient precision farming technology, mainly in soil improvement, fertilizer accumulation and application, drought the earliest soil improvement technology ancient soil improvement, mainly based on people's full understanding of the soil?