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Acta agriculturae Slovenica, 85 - 2, november 2005

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Gravimetric Method (Vol %)

Sensor Measurements (Vol %)

TDR 100 20b

Figure 10: Comparison of Gravimetric method vs. TDR 100 Water Content

Reflectometer measurements of soil volumetric water content for 20 cm

homemade rods for Silt Loamy soil. The dotted line is 1:1 line.

TDR 100 measurements in Sand soil strongly deviated from gravimetrically

determined VWC (dots above the 1:1 line). The deviation was significant for both

original (a) and replicated (b) rods, TDR sensors overestimating the VWC (Figures 11

– 14).

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Campbell TDR Manual do Utilizador Página 12