Resumo

ROSSI, Paulo; MIRANDA, Jarbas H.  e  DUARTE, Sérgio N.. Breakthrough curves of nitrate ion using deformed and non deformed soil samples. Eng. Agríc. [online]. 2007, vol.27, n.3, pp. 675-682. ISSN 0100-6916.  http://dx.doi.org/10.1590/S0100-69162007000400010.

There is a great importance to quantify the trace and the chemical elements transport in soil. This work had as objective to obtain the transport parameters of the nitrate ion in soil (pore water velocity (v), retardation factor (R), dispersivity (l) and the dispersion coefficient (D)) in different textures soils, mainly, under different sampling forms (deformed and non deformed). The research was carried out under two samplings forms, mentioned previously, by application of 50 mg L^-1 of NO₃^- in two different soils profiles at a depth of 0-20 cm. The breakthrough curves was made by two forms: traditional methodology (TFSA) and the technique with non deformed sample developed during the research period. The results showed that the transport parameters fitted by the computational program CXTFIT, with deformed sampling, overestimated the parameters values, with exception of dispersivity, when compared to the non deformed sampling, for both soil types.

Palavras-chave : solute dynamic; soil sampling; transport parameters.