We don’t know how long it took, as we’ve only been here a year and the trees have been here over a decade. All I can say is the soil is definitely lower under the trees than it is elsewhere, but how long it takes is impossible to say as we weren’t here to take regular measurements over that time period. It could be as quick as a year, two years, five years, who knows.
Allotment boy is right about pH scale being logarithmic, but a difference of 1 pH unit is equal to a ten fold difference in acidity. A change from pH 7 to pH 5.7 is a big increase in acidity.
How can you lie there and think of England When you don't even know who's in the team
I have collected pine needles from under leylandi and italian cyprus to mulch raspberries with. It probably doesn’t make much of a difference but its a good weed-suppressing mulch and better than adding an alkaline or neutral mulch. I have very alkaline soil (the rasbs are in a raised bed filled mostly with ericaceous compost, some oak leaf mould, some homemade compost). I’m intrigued now by Omori’s experience, so am going to test the soil under the conifers...
Mountainous Northern Catalunya, Spain. Hot summers, cold winters.
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pH 3.0 - 5.0
pH 5.1 - 6.0
pH 6.1 - 7.0
pH 7.1 - 8.0
A change from pH 7 to pH 5.7 is a big increase in acidity.
When you don't even know who's in the team
S.Yorkshire/Derbyshire border