An experiment was carried out to verify if soil hydraulic properties change according to pedologic horizon division. Two oxisols were morphologically described and undisturbed soil samples in five replicates were taken at every 0.10 m down to 1.0 m soil depth for the determination of the hydraulic conductivity in saturated soil (Ko) by the falling-head method, and of soil water retention curves (ψm (θ)) by means of porous plate funnels (tensions of 1, 2 and 4 kPa) and porous plate […]

Tensiometers were installed in a 25 m2 area plot, every 15 cm, at depths varying from 30 to 240 cm, with three repetitions, to determine the matric potential (φm) of a “Terra Roxa Estruturada Latossólica” soil. Its volumetric water content was also indirectly measured by using the soil water retention curve. The θ-method (Libardi et al., 1980) fitted the soil redistribution profiles (θ vs t) with determination coefficients (R2) greater than 0.98. The hyphotesis of a unit hydraulic gradient was […]

This study was carried out at the Center for Nuclear Energy in Agriculture (CENA), Piracicaba, State of São Paulo, Brazil, with the objective of obtaining information about the effect of different application levels of water/vinasse (100, 200, 400, 600, 800 and 1,000 m3 ha-1) on hydraulic conductivity of soil samples homogeneously packed in columns. A constant head infiltrometer and the instantaneous water profile method were utilized to determine saturated and unsaturated soil hydraulic conductivity, respectively. The increase of the vinasse […]