The relation between soil conditions and vegetation, especially of teak forest was studied. Chemical or physical characteristics of the soil only did not give reliable results. Soils were then studied in the field and a detailed soil map of about 1000 ha of teak forest was made. This soil map shows the occurrence and distribution of 29 soil types, which were briefly described. For some soils some chemical and physical characteristics were given in tables. Most soils are Lateritic and Margalitic soils of varying composition and morphology. Often there are horizons with mottled clays or lateritic concretions. Some soils are derived from andesitic, others from quartz-rich or other parent material. The Margalitic soils are developed in heavy-textured clays. Further to this soil investigation an intensive study was made of the vegetation in the same area of Java. The vegetation was classified into various groups according to the development of the forest trees, the shrubs and the ground flora. It was concluded that the soil map was a very important tool for the prediction of the suitability of the land for growing teak.
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