A study was carried out in Koto forest reserve in central Benin (6°56' to 7°02' of north lat. and 02°03' to 02°09' of east long), in order to contribute to the sustainable management of the forest. Phytosociological inventory was done using the synusial approach. Soils were studied through texture surveys, pedological profiles description and laboratory analysis. Silvicultural parameters of plantations were studied using temporary sample plots of 300 m². The study helps to identify and describe twenty-two basic plantcommunities named synusia. Based on their relationships, the synusia have been combined to describe seven phytocoenoses (plant-communities). Each non pioneer phytocoenose is an expression of specific ecological conditions. The study of plantation productivity has shown remarkable homogeneity of productivity level within each non pioneer phytocoenose. Analysis of variance reveals a significant difference at 5% of probability level between the productivity levels of the phytocoenoses. Three productivity levels are identified according to phytocoenoses. The study leads to the conclusion that phytosociology is a reliable tool for forest management.