| http://www.w3.org/ns/prov#value | - Agricultural Research Service (ARS) findings published recently in the journal Crop Science showed no evidence for significant increases or declines in mineral levels in new varieties of broccoli since 1975, and the broccoli contains similar levels of calcium, copper, iron, magnesium, potassium and other minerals that have made the vegetable a healthy staple of American diets for decades.
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