Gadget for Soil Testing

I came across this interesting invention that the designer claims will  analyse your soil and tell you which plants will grow there.

The video is worth watching just for the fun value.

If you’re a bit skeptical about the technology (and I’m right there with you), there’s an old book called “Weeds and Why they Grow,” that accomplishes the same feat by correlating the type of weeds growing on your property with what’s going on in the soils.