Physical-hydric properties of Oxisol and Quartzipsamment associated with the application of wood ash

ABSTRACT The addition of wood ash to soil is an alternative disposing this residue. However, the effects on physical-hydric properties remain divergent. In study, added water characteristic curve, gravitational water, field capacity, total available and saturated hydraulic conductivity were evaluated in Oxisol (40% clay texture) Quartzipsamment (6% sand texture). experimental design was completely randomized a 2 × 4 factorial scheme, where factors two soils four doses ash, with three replicates. came from agribusiness result burning eucalyptus wood. 0, 16, 32, 64 g dm-3. fitted quadratic model as function dose. decreased linearly increase dose for both classes. curve only increased significantly (p ≤ 0.05) more evident than that Quartzipsamment, increments 31%, respectively, at maximum dm-3 ash.