| http://www.w3.org/ns/prov#value | - ???Efforts to breed new varieties of crops that provide greater yield, pest resistance and climate adaptability have allowed crops to grow bigger and more rapidly,??? reported Davis, ???but their ability to manufacture or uptake nutrients has not kept pace with their rapid growth.??? There have likely been declines in other nutrients, too, he said, such as magnesium, zinc and vitamins B-6 and E, b
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