The moisture probes are critical to running of an irrigation property, they tell us how much water is in the soil profile, how much water the crop is using and most important it tells us when we need irrigate the cotton. There are a couple of types of moisture probes about; one type is a electrical probe that works by measuring the conductivity between two wires in the ground, the better the conductivity the more moisture.
The type of moisture probe we use is called a Neutron Moisture Probe we have been using it on the farm for years and find it to be simple and effective method, it works by lowering the probe down a aluminium tube in the ground, the probe then release fast neutrons which lose energy and slow down when they collide with hydrogen the slow neutrons are detected and give a reading. The probe then takes more readings at different depths to give a complete picture of the moisture profile, then once all readings are completed the probe is plugged into the computer which makes up a graph showing the moisture level, usage and how long till irrigation is needed, making managing the crop a whole lot easier. Unfortunately because it uses radiation the operator needs to be accredited so its usually done by the farm agronomist.
If you have any questions on the moisture probes or anything else just leave a comment.
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