A: This is by far the most common question we get.
The short answer is anywhere between 1 hectare to 5 hecares (2.5 – 12 Acres) But it varies!
The long answer is, it depends; on the following variables. Irrigation lines/segments, soil elevation differences, soil homogeneity and different crop regions. In addition, the purpose and motivation behind the installation is also important.
If we need to see how the water propagates in the soil, we completely ignore the 1-5 hectare recommendation, and put sensors 1 meter (3 ft.) apart so that as the water spreads lateraly from the source, we use multiple sensors to see the drainage paths.
If we need to verify that the irrication valves open and close correctly, sensors can be more sparse (depending on the irrigation line topology).
Finally, in a classic installation, we recommend at least 2 sensors/datapoints, per variable that needs to be tested. If if there 2 irrigation lines and 2 types of soils, at least 4 sensors are needed.