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Total Plants: 186
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Plant Low PPM High PPM StdDev *Reference
Rhizophora mangle Leaf -- 83.0 0.6 *
Carya glabra Shoot -- 77.0 0.5 *
Ribes nigrum Fruit 1.0 64.0 0.5 *
Quercus alba Stem 2.0 38.0 0.5 *
Diospyros virginiana Stem 1.0 38.0 0.5 *
Daucus carota Root 1.0 36.0 0.4 *
Phaseolus lunatus Seed 1.0 30.0 0.3 *
Coriandrum sativum Seed 9.0 29.0 0.2 Betting on Boron, Unpublished draft by J. A. Duke on file at USDA, draft and papers relating to boron percentages.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).
Brassica napus var. napobrassica Root 2.5 30.0 0.2 ACTA AGRIC SCAND SUPPL 22: 1980
Cuminum cyminum Fruit 34.0 50.0 0.2 *
Vitis vinifera Fruit 1.0 50.0 0.2 *
Rhus glabra Stem 2.0 34.0 0.2 *
Rhus copallina Leaf 3.0 67.0 0.2 *
Panax quinquefolius Plant 24.0 96.0 0.1 *
Cucumis sativus Fruit 1.0 46.0 0.1 *
Armoracia rusticana Root 6.0 27.0 0.1 ACTA AGRIC SCAND SUPPL 22: 1980
Phaseolus vulgaris Fruit 0.1 45.0 0.1 *
Carya ovata Shoot 2.0 63.0 0.0 *
Pastinaca sativa Root 4.0 25.0 0.0 *
Syzygium aromaticum Fruit 10.0 40.0 0.0 *
*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.