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Soil-sensors: Background information

We have soil sensors buried in the ground at the levels indicated below.
Each level has a temperature probe and a moisture sensor.

Current Planting & Watering Guide

in cm
Moisture - cb    Temperature - °C
Min Max Actual Grow conditions Actual Max Min
10 1000 cb -100 cb 255 cb
ERROR no reading
(>= 240 cb)

100°C -100°C 100°C
30 1000 cb -100 cb 255 cb
ERROR no reading
(>= 240 cb)

255°C -100°C 100°C

Explanation Soil condition

Water potential is commonly measured in units of bars (and centibars in the English system of measurement) or kilopascals (in metric units).
One bar is approximately equal to one atmosphere (14.7 lb/in 2 ) of pressure. One centibar is equal to one kilopascal.

Buttton text Explanation
(0 - 11 cb)
Saturated Soil. Occurs for a day or two after irrigation.
(11 - 26 cb)
Soil is adequately wet (except coarse sands which are drying out at this range)
Irrigation desired
(26 - 61 cb)
Usual range to irrigate or water (except heavy clay soils).
Irrigate at the upper end of this range in cool humid climates and with higher water-holding capacity soils.
Irrigation needed
(61 - 101 cb)
Usual range to irrigate heavy clay soils
Dangerous Dry
(101 - 240 cb)
Soil is becoming dangerously dry for maximum production.

Record Soil Temperatures

in cm
This month This year All time
Date Min Max Date Date Min Max Date Date Min Max Date
10 11-05 100.0 -50.0 11-05 11-05 100.0 -50.0 11-05 11-05-2013 100.0 -50.0 11-05-2013
30 01-04 100.0 -100.0 01-04 01-01 100.0 -100.0 01-01 04-06-2013 0.0 0.0 04-06-2013