In article ,
Dan L wrote:

Why add sand?
I thought sand + clay = concrete.
I believe organic material alone will help modify the soil.

Sand + clay will lead to harder soil.
Sand + clay + organic material (rye, buckwheat) will lead to more
workable soil. Organic material must be renewed to maintain soil
fertility.
--
- Billy
"Fascism should more properly be called corporatism because it is the
merger of state and corporate power." - Benito Mussolini.
http://www.youtube.com/watch?v=MyE5wjc4XOw
http://www.youtube.com/watch?v=b_vN0--mHug