Gardener with basket of egg shells spreading crushed shells around tomato plant - VH-studio/Shutterstock A quality eggshell contains about 2.2 grams of calcium carbonate, the compound that gives them ...
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Experts Urge Gardeners to Scatter Crushed Eggshells Around Their Bird Feeders: ‘It Helps Their...'
When laying eggs, female hummingbirds and several other birds exhaust a lot of their body’s calcium supply. This means they need a good calcium supplement to replenish their bones and build muscle.
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