soil pin by piyarerk meeudompong from thailand

I think every life such as human,animals or plants can be sick ,In the same way , I think soil that correlate with plants can be sick too .When we get ill we can observe it from our body,but for soil we can't. It's good if we can see the health of soil with some gadget. Therefore, I design this gadget to help us know about health of soil .