posted 13 years ago
He says he doesn't use lime, because he lives in the Alps, which are rich in limestone.
Conifers make soil acidic, while compost from broad leaves slowly tends to bring back the pH to 6 or 7. So basically either you correct the soil with lime or add large amounts of organic matter.
Since he is not growing conifers and his soil is already rich in lime, and he is also adding plenty organic matter, I guess he already has the soil around pH 7, so he doesn't need to add any lime.
You can do this in your own garden too (no need for lime, only organic matter), but what if you live in a cool and wet climate with a very acidic soil like me? Even after adding compost, the rain could make the soil slowly acidic again.
And yes, dry soils (like deserts) tend to be more alkaline, while wet soils acidic (like peat).
Ashes also make the soil alkaline, but can make it too much, if you use too much.
Our projects:
in Portugal, sheltered terraces facing eastwards, high water table, uphill original forest of pines, oaks and chestnuts. 2000m2
in Iceland: converted flat lawn, compacted poor soil, cold, windy, humid climate, cold, short summer. 50m2