Application note: Improvement of a dual-sensor horizontal penetrometer by incorporating an EC sensor

  • Authors:

  • Q. Zeng;Y. Sun;P. Schulze Lammers;D. Ma;J. Lin;H. Hueging

  • Affiliations:

  • Research Center for Precision Farming, China Agricultural University, Quinghua Donglu 17#, Beijing 100083, China;Research Center for Precision Farming, China Agricultural University, Quinghua Donglu 17#, Beijing 100083, China;Department of Agricultural Engineering, University Bonn, Bonn 53115, Germany;Research Center for Precision Farming, China Agricultural University, Quinghua Donglu 17#, Beijing 100083, China;School of Technology, Beijing Forestry University, Beijing 100083, China;Institute of Crop Science & Resource Conservation, University Bonn, Bonn 53115, Germany

  • Venue:
  • Computers and Electronics in Agriculture
  • Year:
  • 2008

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Abstract

Following the development of a dual-sensor horizontal penetrometer for the simultaneous measurements of soil water content and strength, an electrical conductivity (EC) sensor with a 4-ring Wenner-array was incorporated into the cone of the horizontal penetrometer. In order to overcome the cross-modulation of signals from water content and EC sensors, two filters with specific pass-bands were connected in each circuitry. Both laboratory calibration and field test were conducted, and the experimental results showed that the improved technique could provide more informative data to interpret soil physical conditions at field-scale.