Campbell Scientific HydroSense® Soil Water Content System (CS620, CD620) - Manual (Page 4)

HydroSense Table of Contents
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A. Definition of Water Content Terms ........................ A-1
A.1 Definition of Water Content Terms .................................................... A-1
B. How Many Soil Water Content Measurements
Are Enough ........................................................... B-1
B.1 Introduction to Spatial Variability....................................................... B-1
B.2 An Example......................................................................................... B-1
B.3 Some Background on Confidence Intervals........................................ B-1
B.4 Determining the Minimum Number of Samples ................................. B-2
Figures
1-1 The HydroSense system consists of the CS620 sensor (left),
the CD620 display (right), and two rods ............................................. 1
4-1 Selecting probe rod length....................................................................... 5
5-1 HydroSense display in Water Deficit Mode ............................................ 7
5-2 Selecting the site, lower (0) and upper (100) reference levels................. 8
5-3 Relative water content and deficit for example application..................... 9
8-1 Rear view of the HydroSense display unit with battery cover removed .... 13
8-2 Newer CS620 rod design (left) and older CS620 rod design (right) ..... 14
Tables
B.2-1 Sample Water Content Data............................................................. B-1