SciELO - Scientific Electronic Library Online

 
vol.85 issue207Methodological proposal for the analysis and measurement of sensory marketing integrated to the consumer experienceA practical calculation of the distance to a discontinuity in anisotropic systems from well test interpretation author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


DYNA

Print version ISSN 0012-7353

Abstract

DUARTE GUEDES CABRAL DE ALMEIDA, Ceres et al. FDR ECH2O sensor performance in Spodosols. Dyna rev.fac.nac.minas [online]. 2018, vol.85, n.207, pp.60-64. ISSN 0012-7353.  https://doi.org/10.15446/dyna.v85n207.71897.

Frequency domain reflectometry (FDR) is widely used to measure soil water content. However, the effects of soil composition on FDR calibration have to be quantified to reduce the need for further calibration. Our objectives were to: (1) evaluate the accuracy of EC-5 for measuring water content in sandy soils, and (2) develop a soil-specific sensor calibration curve. Disturbed and undisturbed soil samples were collected in one Spodosol profile (07º 37’ 30” S, 34º 57’ 30” W) representative of the region where sugarcane is grown in northeastern Brazil. Regression analysis showed good accuracy and low error (RMSE = 0.01 m3 m-3), while without specific calibration the error was higher (RMSE = 0.06 m3 m-3). The EC-5 sensor should be subjected to field-specific calibration in sandy soils due to the low field capacity and water content during the growing season.

Keywords : EC-5; sandy soil; volumetric water content; probe; capacitance.

        · abstract in Spanish     · text in English     · English ( pdf )