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Ciência Rural

versão impressa ISSN 0103-8478versão On-line ISSN 1678-4596

Resumo

SOUZA, Anderson Luiz de et al. Time domain reflectometry for studying potassium leaching in unsaturated soil columns. Cienc. Rural [online]. 2009, vol.39, n.4, pp.1219-1222.  Epub 03-Abr-2009. ISSN 0103-8478.  http://dx.doi.org/10.1590/S0103-84782009005000056.

The aim of this research was to evaluate the advantages of using unsaturated soil columns equipped with TDR probes (Time Domain Reflectometry) coupled to an automated system of data acquisition for monitoring water and potassium movement in soils. The research was conducted in acrylic columns of 0.35m of internal diameter and 1.05m of length filled with air-dried soil. The use of TDR technique allowed obtaining time-space network at short time intervals, indicating levels of soil moisture and electric conductivity (Ce) at different depths. The results may represent an important help for the works on the proposition and validation of mathematical models that describe numerically these processes, contributing to a better understanding of the dynamics of water and potassium in soils.

Palavras-chave : TDR; solute movement; unsaturated soil column.

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