This study was carried out to select economical byproduct composts as the substitute for the traditionalorganic fertilizer, Yacto, in the cultivation of ginseng seedlings, and to investigate the application method of a selected com-post. Among tested byproduct composts, popped rice hull compost was the best substitute for Yacto, while the application ofdomestic animal manure composts resulted in red skinned roots of ginseng seedlings. Optimal mixing ratio of the poppedrice hull compost with virgin soil (fine sand) were 3~4:1 in bulk, showing the same root yield compared to that of conven-tional seedbed soil. When the popped rice hull compost was lower than 1±0.1% in nitrogen content, the expeller cake of oilseed was added to seedbed soil to rise nitrogen content until 1±0.1%.

• 강승원(농촌진흥청 국립원예특작과학원) | Seung Weon Kang Corresponding author
• 연병열(농촌진흥청 국립원예특작과학원) | Byeong Yeol Yeo
• 이성우(농촌진흥청 국립원예특작과학원) | Sung Woo Lee
• 현동윤(농촌진흥청 국립원예특작과학원) | Dong Yun Hyun
• 배영석(농촌진흥청 국립원예특작과학원) | Yeoung Seuk Bae
• 현근수(농촌진흥청 국립원예특작과학원) | Geun Soo Hyeon