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Total Plants: 4
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Plant Low PPM High PPM StdDev *Reference
Brassica nigra Seed -- -- *
Nasturtium officinale Plant -- -- *
Brassica oleracea var. capitata l. Leaf -- -- USDA's Ag Handbook 8 and sequelae)
Armoracia rusticana Root 292.0 540.0 Guenther, E., The Essential Oils, 6 volumes, D. van Nostrand, New York, 1948-1952.
*Unless otherwise noted all references are to Duke, James A. 1992. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton, FL. CRC Press.