Eierschalen

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Eierschalen bestehen aus Calciumcarbonat (https://de.wikipedia.org/wiki/Calciumcarbonat) (CaCO3).

In der Natürlichen Landwirtschaft sind die Eierschalen die wichtigste Zutat des Water Soluble Calcium (WS-Ca oder WCA).

Literatur

• Freire, M.N. Holanda, J.N.F. (2006): Characterization of avian eggshell waste aiming its use in a ceramic wall tile paste (https://www.scielo.br/j/ce/a/KrPjh9J6gwZGJ7xkfjZ93Ck/?lang=en). Cerâmica 52: 240-244. doi:10.1590/S0366-69132006000400004 (https://doi.org/10.1590/S0366-69132006000400004)
• Lamzik, K.E. (2013): “It all began, like so many things, with an egg,” An Analysis of the Avian Fauna and Eggshell Assemblage From a 19th Century Enslaved African American Subfloor Pit, Poplar Forest, Virginia. Master Thesis. The University of Tennessee. 133 S. (Abstract (https://trace.tennessee.edu/utk_gradthes/1635/))