I am looking into soil sensors to connect to an arduino project I am doing. This is just for me playing around and trying to optimize my garden as much as possible with tech 😋 So far the sensors seem to be working great and I am making cool charts. BUT I am not sure the best placement for sensors. I have 30 sensors so far, and I have up until now, only placed them in the top soil. I have read that in large installations these sensors are placed 3 or 4 on top of each other like in this picture:
So! here is my question: I have some "Soil Moisture/temp/EC" sensors, they are really cheap. I also have some "soil PH" sensors, they are not so cheap.
Does the PH sensor work better at any specific level of the hole, that being 5cm,10cm, 20cm,.... so on. OR should I have a PH sensor at EVERY level as well as the soil moisture/temp/ec.
The soil that I have is primarily top soil, it is soil that I have turned and try to keep fresh (I add more top soil every year). Under the top soil there is clay (aprox. 1.5m down). I think water does collect at that area.
I am growing a few plants such as sweet potatos, and tomatos as well as cucumbers. All plants that don't particularly have deep roots.
I do have 5 orange trees and some tea bushes.
Thanks for the info! -Kevin