Observations were made in four plantations of A. dammara, all situated in
the steeply sloping headwater area of the Mondo river basin, just south of
the town of Banjarnegara, central Java (7°26'S and 109°45'E).
The study site receives on average 4770 mm of rain per year (1926--
1977), distributed over 176 raindays. A dry season occurs between July and
September, when on average there is less than 60 mm rainfall per month in
two out of three months. Mean annual evaporation (Penman estimate)
amounts to 1345 mm and seasonal extremes in temperature range between
21.5°C (dry season) and 24°C (rest of the year).