RE: Electronic soil tester...
The buffer pH is titrated with a buffer solution to raise the pH to a certain point. Two soils can have the same actual pH but one soil could need 10 times more buffer to raise the pH to the same point. That' s why some soils may need 10 tons of lime per acre and others need 1 ton when they both have the same pH.
The meter can be used to monitor the pH but you never know how much lime you' ll need until you get to the final pH. You' ll also have to put on many additions over a long period of time to get to the end point.
Dan O.