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Seasonal Activity of Tte Cambium in the Young Branch of Sweetenia Macrophylla King

E.B. Hidajat, T.S. Suradinata & B.I. Utomo

Abstract. Seasonal variation in the activity of the vascular cambium of Swietenian macrophylla King has been investigated from August 1983 to July 1984. Cambial activity is slow in August, and in September dormant features are seen. After the preceding dry months the cambium shows activity again in October when heavy rainfall occurs. The activity continues during the following months and slows down in March. The cambium is most active in April when a second peak of rainfall occurs in the rainy season. This grand activity of the cambium coincides with the emergence of a new crop of leaves which is preceded by a brief period of defoliation. Cambial activity slows down again in the following months.


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