07-02-2012, 04:15 PM
posted to rec.gardens.edible
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First recorded activity by GardenBanter: Sep 2010
Posts: 330
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compost and eggshells
http://www.aces.edu/timelyinfo/Ag%20...er/s-05-05.pdf
"Coarsely crushed eggshells are relatively ineffective as a soil
liming material or as a source of calcium. Although the sample used in
this study had a total neutralizing value of 59% of pure calcium
carbonate, it had to be very finely ground in order to be effective at
increasing soil pH. Broken egg- shells can be safely land applied.
Nitrogen from protein residues in eggshells and possibly other
nutrients will eventually add to the fertility of the soil. Except for
nitrogen, this will probably be a*very slow process. Therefore, unless
shells are mechanically ground at least as finely as ground
agricultural limestone, they should not be used as a substitute for
conventional soil liming materials. However, we do not suspect any
negative effect from their application to the soil."
Also:http://www.aces.edu/timelyinfo/Ag%20...er/s-05-05.pdf
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