ii
10.
References ............................................................... 23
Appendices
A.
Discussion of Soil Water Content ......................... A-1
B.
Importing
Short Cut
Code ..................................... B-1
C.
Example Programs ................................................ C-1
C.1
CS616 Programs .............................................................................. C-1
C.1.1
CR1000 Program for Measuring Eight CS616 Probes ............. C-1
C.1.2
CR1000/Multiplexer Program for Measuring 48 CS616
Probes .................................................................................... C-3
C.2
CS625 Programs .............................................................................. C-5
C.2.1
CR200(X) Program for Measuring Four CS625 Probes ........... C-5
C.2.2
CR200(X) Program with Temperature Correction ................... C-6
Figures
7-1.
Water content reflectometer wires ....................................................... 8
8-1.
CS616 and CS625 linear and quadratic calibrations derived from
loam soil ......................................................................................... 11
8-2.
CS616 response for different soil types ............................................. 12
8-3.
Linear versus quadratic calibration differences ................................. 13
8-4.
Percent volumetric water content error adjusted with temperature
correction equation ......................................................................... 17
Tables
7-1.
Datalogger/Reflectometer Wiring. ....................................................... 7
8-1.
Standard calibration coefficients for linear and quadratic forms ....... 13
8-2.
Calibration coefficients for sandy clay loam with bulk density
1.6 g cm
–3
and electrical conductivity at saturation 0.4 dS m
–1
for both linear and quadratic forms. ............................................... 14
8-3.
Calibration coefficients for sandy clay loam with bulk density
1.6 g cm
–3
and electrical conductivity at saturation 0.75 dS m
–1
for both linear and quadratic forms. ............................................... 14
C-1.
Datalogger Connection for Eight CS616s Example Program .......... C-1
C-2.
Wiring for CR1000/Multiplexer Example ....................................... C-3
C-3.
Wiring for CR200(X) Program Measuring Four CS625 Probes ...... C-5
C-4.
CS625 Wiring for CR200X Program with Temperature
Correction ..................................................................................... C-6
C-5.
109 Wiring for CR200X Program with Temperature Correction .... C-6
