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TriSCAN Manual Version 1.2a
Copyright © 1991 – 2004 Sentek Pty Ltd All rights reserved
Table of Contents
Disclaimer.................................................................................................................3
Table of Contents......................................................................................................4
List of Figures............................................................................................................i
List of Tables.............................................................................................................ii
Introduction .............................................................................................................. 1
TriSCAN: Sentek’s Fertilizer/Salinity and Soil Water Monitoring System..................................................1
Important Definitions and Terms....................................................................................................................1
Salinity – the problem........................................................................................................................................2
Where does the salt come from?......................................................................................................................3
Global impacts of salinization...........................................................................................................................3
Why measure salinity and soil water content?.................................................................................................3
Fertilizer management .......................................................................................................................................4
What is TriSCAN?....................................................................................................5
TriSCAN Features..............................................................................................................................................5
TriSCAN Applications.......................................................................................................................................6
Benefits of TriSCAN Applications...................................................................................................................6
How does the TriSCAN sensor work?....................................................................7
Sensor output and measurement units.............................................................................................................7
Measurement Range and Soil Suitability..........................................................................................................7
Resolution and Accuracy...................................................................................................................................7
Temperature Effects ..........................................................................................................................................8
Getting TriSCAN ready for logging........................................................................9
Probe Assembly and Sensor Addressing.........................................................................................................9
Probe Configuration and Normalization.......................................................................................................12
Site Selection...........................................................................................................18
What is site selection?......................................................................................................................................18
Relationship between macro and micro zones in the field..........................................................................18
Important factors for macro site selection....................................................................................................19
A general view of macro scale zone selection...............................................................................................23
Micro scale zone selection...............................................................................................................................25
Micro zone selection guidelines ......................................................................................................................25
Access Tube and Probe Installation......................................................................28
Standard TriSCAN Access Tube Installation Method.................................................................................28
EasyAG TriSCAN Installation.......................................................................................................................31
Benchmarking Soil Salinity – TriSCAN Calibration............................................33
Sampling Method.............................................................................................................................................33
Laboratory Methods.........................................................................................................................................35
Adjusting the Salinity scale from Volumetric Ion Content (VIC) units to EC or EC
e
units...................36
Salinity and Soil Water Data Interpretation..........................................................37
Example 1 .........................................................................................................................................................37
Example 2 .........................................................................................................................................................39
Example 3 .........................................................................................................................................................40
- Agronomic User Manual 1
- Version 1.2a 1
- Disclaimer 3
- Table of Contents 4
- List of Figures 6
- List of Tables 7
- Introduction 8
- Salinity – the problem 9
- TriSCAN Manual Version 1.2a 10
- Fertilizer management 11
- What is TriSCAN? 12
- TriSCAN Applications 13
- Resolution and Accuracy 14
- Temperature Effects 15
- Assembling the Probe 16
- Addressing the Sensors 18
- Step 1 – Powering the probe 19
- Site Selection 25
- Climate 27
- Cultural Management 29
- Irrigation System 30
- Water Quality 30
- Micro scale zone selection 32
- Plant health 33
- Installing the Access Tube 35
- Cleaning the Access Tube 36
- Installing the Top Cap 37
- Installing the probe 37
- EasyAG TriSCAN Installation 38
- Fitting the top cap lid 39
- Sampling Method 40
- Laboratory Methods 42
- Example 1 44
- Example 2 46
- Example 3 47
- Conversion Factors 48
- Salinity for Irrigation 49
- Soil Solution 59
- References 60
- Acknowledgements 61
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