In article , Tom Jaszewski
wrote:
On 12 Jun 2003 14:24:59 GMT, (Marley1372) wrote:
Personally, I
just think gypsum is a bunch of crap.
It's a good thing sustainable farmers don't share your opinion!!!
Gypsum is mainly helpful in sodic soils and is generally misapplied to
all clay soils. They help sodic soils because the calcium displaces
sodium which allows clay particles to flocculate and thus improve
drainage. In soils that are already high in calcium this obviously cannot
occur and so is indeed a waste.
See:
http://www.wtamu.edu/~crobinson/DrDirt/gypsum.html
http://turfgrass.hort.iastate.edu/extension/gypsum.pdf
Roland