Quote:
Originally Posted by crash
Gypsum is used on clay soils and it will increase the ph. All the soil I have seen around here is sand. Definitely get it tested and talk to a master gardener.
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RE: increasing ph-making our already alkaline soil more alkaline
You may be confusing Lime with Gypsum. Gypsum is supposed to as lime does, improve the structure of clay soil but gypsum does not change the ph as it has sulfur in it. so it is claimed not to effect ph either up or down
As lime does, gypsum does add calcium to the soil. There is supposed to be a ratio of calcium to magnesium.
What I find interesting is that gypsum has been used for centuries.Ben Franklin mentioned using it and yet all the information I've been able to find, including those that suggest using it do not supply clear instructions as to how much and how often.