Nongsa jikseol compiled

Sejong had the advice of experienced farmers in every province gathered into Nongsa jikseol, a manual of farming suited to Korea’s own climate.

Until then Korea relied on manuals written for northern China. Sejong ordered Jeong Cho and others to have provincial governors collect the experience of veteran farmers and compile it (1429) — the first farming manual written for Korean conditions.

Sejong’s reign produced many such works on Korea’s own conditions: the Hyangyak jipseongbang of native herbal remedies (1433), the illustrated Samgang haengsildo of filial sons, loyal subjects and virtuous women to teach Confucian ethics (1434), and the medical encyclopedia Uibang yuchwi (1445).