Improved Calibration Functions of Three Capacitance Probes for the Measurement of Soil Moisture in Tropical Soils
作者: Ali FaresFarhat AbbasDomingos MariaAlan Mair
刊名: Sensors, 2011, Vol.11 (5), pp.4858
来源数据库: Directory of Open Access Journals
关键词: sensor calibrationsingle capacitance sensorssoil water contenttropical soilsvariable soil properties
原始语种摘要: Single capacitance sensors are sensitive to soil property variability. The objectives of this study were to: (i) establish site-specific laboratory calibration equations of three single capacitance sensors (EC-20, EC-10, and ML2x) for tropical soils, and (ii) evaluate the accuracy and precision of these sensors. Intact soil cores and bulk samples, collected from the top 20 and 80 cm soil depths at five locations across the Upper Mākaha Valley watershed, were analyzed to determine their soil bulk density (ρb), total porosity (θt), particle size distribution, and electrical conductivity (EC). Laboratory calibration equations were established using soil packed columns at six water content levels (0–0.5 cm3 cm−3). Soil bulk density and θt significantly varied with sampling depths; whereas,...
全文获取路径: DOAJ  (合作)
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影响因子:1.953 (2012)

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关键词翻译
关键词翻译
  • calibration 校准
  • laboratory 实验室
  • watershed 分水岭
  • sampling 取样
  • specific 
  • capacitance 电容
  • density 密度
  • depths 
  • accuracy 准确度
  • precision 精度