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Wood density (DM) is a widely used variable for estimating carbon stocks of trees and shrubs in terrestrial ecosystems. This subject is little investigated in open areas of the Amazon, such as savannas and meadows. The objective of this study was to investigate the DM response of trees and shrubs typical of savanna areas of the northern extreme of Amazonia in relation to edaphic factors and altimetry in six different collection sites. We collected about 8 sample disks in three different diameter classes (< 5cm, 5-10cm and> 10cm) of each of the 75 individuals observed along six sample sites in open savanna areas of Roraima. Around each individual, four soil samples were collected, distant lm from the base of the plants, in the N, S, L and O directions at a depth of 20cm. The soil samples were homogenized and analyzed according to texture and fertility. The DM variation was verified as a function of: pH …