Wang Zhen also created an agricultural calendrical diagram in the form of a circle, which included the Heavenly Stems, the Earthly Branches, the four seasons, twelve months, twenty-four solar terms, seventy-two five day periods, with each sequence of agricultural tasks and the natural phenomena which signal for their necessity, stellar configurations, phenology, and the sequence of agricultural production.
Wang Zhen also created an agricultural calendrical diagram in the form of a circle, which included the Heavenly Stems, the Earthly Branches, the four seasons, twelve months, twenty-four solar terms, seventy-two five day periods, with each sequence of agricultural tasks and the natural phenomena which signal for their necessity, stellar configurations, phenology, and the sequence of agricultural production.