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Total Plants: 186
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Plant Low PPM High PPM StdDev *Reference
Vigna unguiculata Seed 3.0 60.0 1.7 *
Vitis vinifera Fruit 1.0 50.0 0.2 *
Xanthosoma sagittifolium Root 0.9 6.5 -0.6 *
Zea mays Seed -- 15.0 -0.4 *
Zingiber officinale Root 1.0 4.0 -0.7 Betting on Boron, Unpublished draft by J. A. Duke on file at USDA, draft and papers relating to boron percentages. Includes Internat. Z. Vit. Ern. Forschung 43:1973 (boron).
Zingiber officinale Rhizome 1.0 4.0 *
*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.