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Seasonal variations of the leaf oil contents and the amounts of terpene emission of Cryptomeria japonica, Chamaecyparis obtusa, Abies sachalinensis, Thuja occidentalis, Thuja standishii, Cupressus sempervirens andCinnamomum japonicum were studied. The leaf oil contents and the amounts of terpene emission were high in summer and low in winter. It was suggested that the terpene emission varied with...
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