In a message dated 2/10/2010 12:51:17 PM Eastern Standard Time, 
writes:
writes:
Long ago Tom Stettner turned me on to gypsum as a soil additive.
Terrific stuff.
It flocculates the clay, making it easier for things like leaf litter to incorporate.
Linda Wallpe has taught those of us in the Cincinnati area the joys of using the word “flocculates”.
Bill Lee