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Page count: 14

The rare earth concentrations in vegetables (corn, potatoes, peas, and butternut squash) were found to be extremely low: 10-8 g/g to 10-10 g/g. The chondritic normalized vegetable REE patterns are fractionated, including a negative Eu anomaly, and behave as a smooth function of the REE ionic radii. These patterns may be governed by the geochemistry of accessory minerals in the host soils. The depletion factors for various elements by vegetables relative to bulk soils are approx. 10-4 for REE, Hf, Ta, Th, and U; approx. 10-3 for Al, As, Ba, Cr, Fe, Mn, Sc, Se, And Sr; approx. 10-2 for Co, Cs, Na, Ni, and Sb; approx. 10-1 for Rb; and approx. 1 for K, Zn, and Br.