SILVA, I. A.; http://lattes.cnpq.br/1453392311223502; SILVA, Irênio Amaro da.
Résumé:
The purpose of this work is to cordate dielectic constant and soil moisture experimental
data in way to produce equations that can be applied on soil moisture estimation. On this
work it is presented experimental data and evaluation on soils moisture determination by
means o f transmition and reception of micro wave signal. For this,it was utilized a TDR
technique (Time Domain Reflectometry). It was applied a cable tester that generates
eletromagnetic waves in the frequency of 1.2 Mhz. This equipment allows to measure the
dielectric constant of soil that can be correlated with its soil moisture. About this
correlation there are several ideas. There are those authors that recomend a "universal"
equation to correlate dielectric constant with moisture. Others those recomend that every
soil have their own correlation. These correlations are calibrated to each case by statistical
to experimental data. The test and measuments were corred out on laboratory. The
experiments were applied to five diffent soils. Litossolo, Podzolico Vermelho - Amarelo,
Arei quartzoza, Latossolo Vermelho Escuro e Latossolo Vermelho Amarelo. With data
obtained on test of each kind of volumetric soil moisture and dieletric constant determined
with TDR equippment were correlated. The fited curves to several soil were compared to
Topp curve.New curves are proposed to determine the volumetric soil moisture as wellas
the function of dieletric constant, taking in account the kind of soil.
