Part 1—The Diviner 2000 display unit and probe
Irrigation scheduling using Diviner 2000 data
Page 30
ACN 007 916 672
Sentek Pty Ltd
outputs from this soil at different depths have proved to be an excellent
site-specific mirror of irrigation and crop water use.
Your Diviner 2000 data trends will help you to:
•
calculate daily crop water use
•
identify the active root zone
•
recognize irrigation Full Point and the onset of crop water stress.
Note:
this information is used collectively to build a soil water
budget on which the irrigation schedule is based.
From your plotted data trends, you may also observe water logging and
rising water tables.
To observe and understand the soil water trends you need to:
•
take frequent soil moisture readings
•
plot your data on the Sentek Pty Ltd Irrigation Management Chart
or use IrriMAX Data Exchange to import Diviner 2000 readings.
Plotting data on your Irrigation Management Chart
The
Irrigation Management Chart
is used to record readings at specific
sites. This information can also be kept on your PC, using IrriMAX.
A chart records three-month sets of
Diviner 2000
data from one site. In
this way, seasonal data can be recorded from year to year and seasonal
trends can be easily identified from one sheet.
The
Irrigation Management Chart
can be used to plot separate and
summed level readings. Soil moisture values have not been included on the
y-axis. The scale has been left blank as it will depend on the profile being
monitored and the moisture content of the different textual layers. You are
advised to customize the scale for your particular profile.
If you are plotting soil moisture contents for each depth interval, i.e.
separate level graphs, start at the top left hand corner with the 10 cm layer.
Start plotting data for the 20 cm layer below the 10 cm etc. For all separate
layer trends use the same scale but different colors.
Ø
To complete the header information
1.
In the information section of the chart, fill in the number of the
Diviner 2000
profile that corresponds to the chart data.
Note:
If there is more than one profile at the site being recorded on this
chart, write the numbers for both profiles. Use different colors.
2.
Fill in the name of the site.
Summary of Contents for Diviner 2000
Page 6: ......
