...
I attach the plot that I made of these lab data. Note that the symbols 1--5 refer to TP01 sensors 1,2,4,10,11 respectively.
P.S. (Apr 2011): These files are on my PC/projects/pcaps/soilkeg.qq. Adjusting the values using the readings in Agar taken in Sept 2010 reduces the scatter (to generally within the 20%/5% specification), especially in Lambda, though there still is more variation in Csoil than I'd like. Still haven't measured Rs.
P.P.S. See new logbook entry Apr 2011 about post-project testing.