"Phil L" wrote
..and didn't get a definitive answer, so I'm asking again.

I have noticed in farmers fields, huge piles of what appears to be a
blueish/greyish stone, I work in the construction industry and to me it
looks like MOT, or crush & run, but blue.
Upon closer inspection (IE picking it up) it has no odour, feels like soft
stone and the 'stones' range from 3 inch down to grit.
The piles of this I have seen in various (crop growing) feilds range from
50 to 100 tonnes, and the farmers spread it over the entire field round
about this time of year....last time I asked, it was suggested that the
farmers were having drives laid or tracks for farm machinery to drive on,
since I've recently seen it being spread, I know this is not the case, I
cannot believe that it's for any kind of drainage neither and I imagine
it's fertilizer of some sort, has anyone else seen this? - does anyone
know what it does or what it's called?


Dried treated sewage solids perhaps?

--
Regards
Bob H
17mls W. of London.UK