Why should tilth not be too fine?
By Lennox
Yorkshire,
United Kingdom 
I have to do a questionnaire and these are some of the questions I'm not sure of the answers.
1 Jul, 2009
If it's too fine then it will Cap. This means it will 'set hard' froming a kind of crust and not allow seeldings to come through.
Google coil cap to see if you can find out more
5 Jul, 2009