1. Department of Environmental Horticulture, The university of Seoul Seoul, 130-743, Korea
2. Technology Service Division, National Institure of Horticultural & Herbal Science, Suwon 441-440, Korea
3. Department of Green Technology Convergence, KonKuk University, Chungju 380-701, Korea
4. Department of Controlled Agriculture, Kangwon National University, Chuncheon 200-701, Korea