On 14/12/2014 16:08, stuart noble wrote:
On 14/12/2014 15:35, 'Mike' wrote:
Thanks Bob. It is actually volcanic soil I am interested in improving,
but we have a heat and lack of water problem. My very inexperienced
thoughts are that the compost would add body.


I thought volcanic soil was the ideal growing medium in terms of
nutrients and water holding capacity.
Perhaps you have a holiday home in a volcanic region?

I would have guessed that a volcanic soil is good for potassium and for
trace elements, but might be short on nitrates and phosphates.