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Lime Question
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Posted 11/25/2021 08:47 (#9340194 - in reply to #9340091)
Subject: RE: Lime Question

John Smith - 11/25/2021 08:02

What was said is,
It takes 10X as much lime to go from a 6.5 to a 7.5 compared to going from a 5.5 to a 6.5 
I do not see this on our soils.
This probably is addressed in the Buffer Ph test. 

Negative, the pH scale is logarithmic, like earthquakes maybe? a 5.0 earthquake is 10 stronger than a 4.0 earthquake?

It takes as much lime to raise the ph from 5.9 to 6.0 as it takes to raise it from 6.0 to 7.0. Or as much lime to raise it from 4.9 to 5.0 as to raise it from 5.0 to 6.0, which is roughly ten times as much lime as the first example. Same way on the upper end of the scale, it's easy to accidentally raise an acid soil to 7.5, much harder to get to 8.5.
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