Seasonal Earthworm Casting Activity on Korean Golf Courses

. Earthworm cast occurred in surface of turfgrass in golf courses which affect turfgrass maintenance and golf play. Inthis study several survey of seasonal fluctuation of earthworm cast in different golf courses (Anseong, Gapyeong, Gunpo andYongin in Gyeonggi province, and Geumjeong in Busan) was done. A number of earthworm, soil temperature and moisture ofdetection site of earthworm cast in each golf course were also done. Cast occurred in different golf courses are found mostly fromApril to November on turf surface and the cast number varied in different month as well as in golf courses. In the same golfcourses, a number of detected cast was difference from individual sites. A number of cast and earthworm was correlated. Also, inhigher soil moisture showed the higher cast density in different golf courses. Soil temperature and moisture of detecting castranging from 2.1 o C to 33.1 o C and 4.9 to 44.1%, respectively. In case of cast, soil temperature level lies in between 10-15