andrew wrote:
The Natural Philosopher wrote:

Not sure how limestone 'leaches'


As it crushes some of the material dissolves and carries calcium ions into
the surrounding area, which in our case is a sensitive acid heath, calcium
ions raise the pH and affect the plant life, on which some rare insects are
dependent.


Ah. OK that finally makes sense.


Overkill it may be but the terrram was only a couple of hundred quid to
treat 100 metres of wet patch, inert MOT type 1 was GBP8/tonne more than
limestone and it is working.


Oh, it will work all right. Just seemed expensive. And complicated.



AJH