Jeong Yak-yong or Chong Yagyong, often simply known as 'Dasan', was a Korean agronomist, philosopher, and poet.

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Keywords: 18th, 19th, agronomist, century, chong, dasan, dynasty, jeong, joseon, kingdom, korea, korean, philosopher, poet, poet., scholar, seal, simply, yagyong, yak-yong