05-19-2008, 09:15 PM
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Deity
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Join Date: Jul 2004
Location: Saint Regis Falls, NY, USA.
Posts: 3,841
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gypsum or vermiculite can be used to "soften" hard soil. or a coarse sand can be mixed into the topsoil. it doesn't contribute any "food" to the soil it just makes the soil more pliable. burnt limestone may do the same but increases the alkalinity of the soil.
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