| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Asparagus officinalis | Root | 0.1 | 1.0 | -0.3 | * |
| Asparagus officinalis | Shoot | 0.041 | 0.078 | -0.4 | * |
| Astragalus membranaceus | Root | 0.2 | 1.0 | -0.3 | * |
| Avena sativa | Bran | -- | -- | * | |
| Avena sativa | Plant | 0.3 | 1.3 | -0.4 | * |
| Barosma betulina | Leaf | -- | -- | * | |
| Berberis vulgaris | Root | -- | 3.4 | -0.1 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Berberis vulgaris | Bark | -- | 3.4 | -0.1 | * |
| Bertholletia excelsa | Seed | 3.0 | 497.0 | 4.7 | * |
| Beta vulgaris | Root | -- | 0.002 | -0.4 | ACTA AGRIC SCAND SUPPL 22: 1980 |
| Brassica rapa | Root | -- | -- | * | |
| Brassica oleracea var. gemmifera | Stem | -- | 0.012 | -0.4 | * |
| Brassica oleracea var. botrytis l. | Leaf | -- | 0.024 | -0.4 | * |
| Brassica napus var. napobrassica | Leaf | -- | 0.031 | -0.4 | * |
| Brassica oleracea var. italica | Leaf | 0.002 | 0.024 | -0.4 | * |
| Brassica pekinensis | Leaf | 0.001 | 0.002 | -0.4 | * |
| Brassica oleracea var. gemmifera | Leaf | -- | 0.024 | -0.4 | * |
| Brassica napus var. napobrassica | Stem | -- | 0.017 | -0.4 | * |
| Brassica oleracea var. capitata l. | Leaf | 0.003 | 0.25 | -0.4 | * |
| Brassica oleracea var. botrytis l. | Stem | -- | 0.015 | -0.4 | * |