Campbell-scientific HydroSense® Soil Water Content System (CS620, CD62 Uživatelský manuál stáhnout pdf (Strana 4)

HydroSense Table of Contents

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

1 2 3 4 5 6 7 8 9 ... 27 28

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Campbell-scientific HydroSense® Soil Water Content System (CS620, CD62 Uživatelský manuál Strana 4