DIN 19745
DIN 19745 Soil quality - Principles of the determination of the water content by Time Domain Reflectometry (TDR) and Time Domain Transmissometry (TDT)
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 10/01/2006
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 10/01/2006