Greetings all - I'm interested in people's persuasions on the wisdom of crushing up mollusk shells found in a local river (the Susquehanna near Harrisburg, Pennsylvania to be specific) and use the crushings as a soil amendment in food garden/farm. Great natural source of calcium and carbonate for crops that like less acidic soils and need calcium for strong bones, right? ; ) I'd particularly like to know if there is any reason to be concerned about contaminants being incorporated into the shells and thence into the plants... this seems intuitively unlikely to me, but I'd like to get some other opinions on this practice since I intend to eat, sell, and share the food grown in said soil. Thank you kindly.
Smiles => Brian
