This study was carried out to investigate the effect of legume cover crop culture on earthworm fauna in organic farmland. We compared sod culture with two kinds of legume crops of hairy vetch and crimson clover on organic citrus orchard to natural sod culture and conventional orchards in Jeju Island. We analyzed the soil characteristics and investigated the density of earthworms from the orchards. Organic matter content did not show much difference in soil analysis between organic and conventional orchard. But the biomass of earthworms in organic orchards is 3.8 times to 7.0 times higher than that in conventional cultivated orchards, and individuals of earthworms on organic orchards were 2.3~18 times higher than conventional orchards. The biomass of earthworms on hairy vetch and crimson clover cultivation was 44.8 g, 47.2 g in 2016, and 78.7 g, 31.8 g in 2017, respectively, which were higher than 32.8 g and 9.5 g of those on natural sod cultivation. Through this study, we found that hairy vetch and crimson clover cultivation improve the earthworm occurrence density in the soil on organic citrus orchard.

Ⅰ. 서 론
 Ⅱ. 재료 및 방법
  1. 연구장소 및 시기
  2. 지렁이 채집 및 보관
  3. 지렁이 동정 및 분류
  4. 토양분석
  5. 자료정리 및 통계분석
 Ⅲ. 결과 및 고찰
 Ⅳ. 적 요
 References

• 박종호(국립농업과학원 유기농업과) | Park Jong-Ho Corresponding author
• 김유경(제주특별자치도 농업기술원 친환경연구과) | Kim Yu-Kyoung
• 김용기(국립농업과학원 유기농업과) | Kim Yong-Ki
• 한은정(국립농업과학원 유기농업과) | Han Eun-Jung
• 심창기(국립농업과학원 유기농업과) | Shim Chang-Ki
• 변영웅(국립농업과학원 유기농업과) | Byeon Young-Woong
• 김민정(국립농업과학원 유기농업과) | Min-Jeong Kim
• 김용욱(국립농업과학원 유기농업과) | Kim Young-Wook