Design of a method for measuring instantaneous soil moisture at penetrometer tip

The paper describes different principles of soil moisture determination, based on conductivity, permeability and potentials. The principle of parallel measurements of penetration resistance and soil moisture at the defined depth is a serious experiment to improve and speed up in situ determination o...

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Published inActa Technologica Agriculturae (Slovak Republic) Vol. 6; no. 4
Main Authors Bajla, J.,Slovenska polnohospodarska univ. v Nitre (Slovak Republic). Mechanizacna fakulta, Minarik, J
Format Journal Article
LanguageSlovak
Published 01.12.2003
Subjects
CONTENIDO DE AGUA EN EL SUELO
MEASUREMENT
MEDICION
MESURE
METHODE
METHODS
METODOS
PENETROMETERS
PENETROMETRE
PENETROMETROS
SOIL WATER CONTENT
TENEUR EN EAU DU SOL
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Summary:The paper describes different principles of soil moisture determination, based on conductivity, permeability and potentials. The principle of parallel measurements of penetration resistance and soil moisture at the defined depth is a serious experiment to improve and speed up in situ determination of state of soil conditions. For solving we utilized our experiences from penetration measuring by a penetrometer P-BDH 3A. Two insulated electrodes at penetrometer tip were used as sensing element. After pushing the penetrometer tip into soil, the soil surrounding the sensor at tip represents changeable resistance and capacity that vary with a change in water content of soil. Two sorts of soil - sandy loam (HP) and clay loam (IH) - were used for experimental measurements. Soil moisture measuring by the use of the resistance principle we designed has no linear dependence and based on calibration curves, we estimate measurement accuracy to be in a range of 8-11%. Design modifications and larger measurement surfaces will make it possible to achieve better results.
Bibliography:P33
2004100017
N20
ISSN:1335-2555