Is there any temperature dependence in CS616 or CS625 measurements?

Yes. The dielectric permittivity of water varies with temperature, which will cause the CS616/CS625 period to decrease with increasing temperature and increase with decreasing temperature. In addition, the electrical conductivity of the soil water solution is temperature dependent, causing the CS616/CS625 period to increase with increasing temperature and decrease with decreasing temperature. The net effect of those two opposing forces depends on the soil texture and electrical conductivity. The temperature correction equation in the CS616 and CS625 instruction manual was developed using a sandy loam soil with relatively low electrical conductivity. For soils with finer texture or higher electrical conductivity, Campbell Scientific recommends a soil-specific temperature correction equation.

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