The industrial pollution phase of Cilfái’s history has left a permanent mark in the nature of the landscape. Industrial smelting waste forms a large part of the soil for over twenty percent of the woodlands around The Glade, Roundhouse, and up to Martin’s Pond. Slag takes its place amongst the native sandstone and the glacial debris from the last ice age. The structure and chemical profile of the soil is permanently altered and many trees eventually succumb to the toxicity. This is a good reason why natural regeneration should be favoured over massive new plantation of native species. Natural regeneration allows plants that are resilient to the poisons to develop. I explain more in the second Cilfái book.
P.50 Cilfái: Woodland Management and Climate Change
Nigel Robins 