While on this topic, I was just wondering about how long egg shells take to
become available?
Thanks all
Grant

--- In BrixTalk@yahoogroups.com, "Kris Johnson RR" <cjohnson143@...> wrote:
>
> Oyster shell is calcium carbonate, mostly, a slow but steady supplier of
> high calicum lime (low in magnesium) - readily available. I found that it
> disappears in the soil pretty quickly, even if it is flaked rather than
> ground fine.
> Gypsum is calcium sulfate - provides sulfur as well as calcium, which tends
> to lower pH, loosen heavy clay soils, which are often high in magnesium, and
> helps to wash away the magnesium. If you have sandy soil you probably don't
> need gypsum. If you have heavy sticky clay soil, which is probably high in
> magnesium, you would use some gypsum.
> Kris
>
>
> > Gayla,
> >
> > See if this helps......
> >
> > Gypsum 22% CA and 16% S.
> > Oyster Shell 36% Ca and .3 Mg
> >
> > Way fast acting on gypsum and
> > way slow on oyster shell.
> >
> > HTH.
> >
> > Frank
> >
> >
> >
> > On Jul 6, 2009, at 8:40 PM, Gayla Roberts wrote:
> > > Can someone explain the difference between gypsum and oyster shell
> > > calcium
> > > to me? Thanks.
> > > Gayla
> > >
> > > Bob and Gayla Roberts
> > > Always Enough Ranch
> > > Acampo, CA
>