You probably want to hear a number. But we would have to lie, because the answer depends on what you want to do.
In large-scale arable farming, representative measurement points are suggested to you based on public soil data, remote sensing and plant growth modelling. Of course, you can change this and choose installation points and the number of sensors according to your own experience. Because in the end you know your land best.
Example for arable farming: The home farm of our founder Andreas is located in the low mountain ranges and has 170 ha, of which 145 ha are for arable crops. The fields are divided into 3 districts with 4 main topographical moisture classes. The soils are partly deep, but partly also very shallow. Here we recommend 3 CLIMAVI sensors that measure rain and wind speed, as well as 9 CLIMAVI Soilplant sensors that measure soil moisture. For each district, 1 CLIMAVI Rain + 3 CLIMAVI Soilplant are installed to measure the wettest, driest and medium topography class respectively.