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Total Plants: 186
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Plant Low PPM High PPM StdDev *Reference
Rhus copallina Leaf 3.0 67.0 0.2 *
Murraya sp Fruit 2.8 8.5 -0.6 *
Musa x paradisiaca Fruit 2.8 8.5 -0.6 *
Brassica napus var. napobrassica Root 2.5 30.0 0.2 ACTA AGRIC SCAND SUPPL 22: 1980
Spinacia oleracea Leaf 2.4 40.0 -0.6 ACTA AGRIC SCAND SUPPL 22: 1980
Nyssa sylvatica Leaf 2.0 136.0 2.0 *
Rhus glabra Stem 2.0 34.0 0.2 *
Brassica rapa Root 2.0 20.0 -0.1 *
Sassafras albidum Leaf 2.0 48.0 -0.4 *
Cynara cardunculus Flower 2.0 5.0 -1.2 Betting on Boron, Unpublished draft by J. A. Duke on file at USDA, draft and papers relating to boron percentages.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).
Liquidambar styraciflua Stem 2.0 60.0 2.0 *
Pinus echinata Shoot 2.0 21.0 -1.4 *
Prunus serotina Leaf 2.0 48.0 -0.4 *
Quercus stellata Stem 2.0 25.0 -0.5 *
Phyllanthus emblica Fruit 2.0 11.0 -0.6 *
Pisum sativum Seed 2.0 23.0 -0.1 *
Avena sativa Seed 2.0 7.0 -0.8 Betting on Boron, Unpublished draft by J. A. Duke on file at USDA, draft and papers relating to boron percentages.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).
Elaeagnus umbellatus Fruit 2.0 15.0 -0.5 *
Quercus alba Stem 2.0 38.0 0.5 *
Quercus velutina Stem 2.0 31.0 -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.