[NAFEX] pH question
jfruth at tds.net
Fri May 4 08:44:38 EDT 2007
Donna wrote: "What? Is this true? Because in the south, where you see
pine trees you can
pretty well guess the soil is acid. In fact, in The South, I think if you
see a forest, it's on acid soil. The only places where the soil isn't
acidic is where humans have hauled in ground lime. Or river and creek
bottoms, where gravelly stuff has washed and settled. Upland, it's all
Most soils are at least somewhat acidic. 6.5 to 5.5 is quite common.
The thing about pine trees is that pine trees will grow within a wide
range of pH's, even in soil that is quite acidic, but they do not make the
soil acidic. To that some ask, "They why doesn't anything grow under them?"
Pine trees tend to have a dense canopy that blocks sunlight which plants
need to grow.
Some will argue that pine trees make the soil acidic over geologic time,
a poor case since no one was collecting data over time. There is a grove of
pine trees near where I live that answers the question: These trees are
growing in a slightly alkaline soil (pH 7.3) and IF their soil became acidic
over time, THEN there would need to be a chemical in the soil that would
have made that soil more alkaline, back in time; no such chemical can be
found in that soil.
Pequot Lakes, MN 56472
(218)831-7018 [My Cell]
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