Uso da reflectometria no domínio do tempo no monitoramento de umidade e condutividade elétrica do solo, em condições de campo.

Abstract

The objective of the work was to evaluate some models to predict soil solution electrical conductivity (CEw) as a function of soil water content ( ) and bulk electric conductivity (CEa) data obtained under field conditions by means of time domain reflectometry (TDR). Data were collected during a period of eight days with two fertirrigation events. Soil solution samples were collected immediately before and after each fertirrrigation event and in a frequency of 24 hours between the two events using water samplers. Six models for estimating CEw as a function of CEa and were fitted to the field data and the analyses were based upon the goodness of fit and the coefficient of Y = aX. All models estimated reasonably CEw indicating the possibility of estimating and monitoring CEw by TDR technique under field conditions.