Electronic soil testers

[Worth1]

My wife made me get a soil tester and I was wondering how accurate they were.
(That's right blame it on the wife.)


I tested the soil were I have some oddball stuff growing and it said it was to fertile and too acidic
The ph was in the 3 range
I then stirred in a goodly portion of wood ashes to raise the ph and it came up to 7 and the fertility was in the ideal area.

Does anybody use these things?
Or should I just do like I always do and look at how the plants grow and what they look like.
At least I could use it for a reference to see any changes I made in the soil.
I honestly don’t see how it could measure fertility accurately.

Worth