Farm Table says:
This fact sheet produced by Agriculture NSW Water Unit in 2014 looks at making a soil moisture probe.
A simple way of judging the depth of soil wetting after irrigation or rain is to use a soil moisture probe or push probe and measuring the depth of wetted soil provides useful information about how plant roots can access soluble nutrients within the soil profile.
The key points covered include:
- making a soil moisture probe
- using the soil moisture probe
Information about how deep soil is wet may be used to determine if the root zone of the crop or pasture is wet or not. In rainfed systems, the wetness of the soil profile can determine if a crop or pasture:
- can be planted
- the amount of pasture likely to be grown from a rainfall event
- if grain fill is likely to occur from stored soil moisture
- if major events like flowering will occur in a particular pasture species
These are all important production questions worthy of consideration.