| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Urtica dioica | Leaf | 0.3 | 2.7 | -0.4 | * |
| Vaccinium macrocarpon | Fruit | 0.05 | 0.38 | -0.7 | ACTA AGRIC SCAND SUPPL 22: 1980 |
| Vigna unguiculata | Seed | -- | 6.0 | 0.2 | * |
| Vigna radiata | Seed | -- | 3.456 | -0.2 | * |
| Vigna unguiculata | Seed | -- | 6.0 | 0.2 | * |
| Vigna mungo | Seed | -- | 5.664 | 0.2 | * |
| Vitis vinifera | Fruit | 0.01 | 0.77 | -0.5 | * |
| Zea mays | Seed | 0.12 | 6.3 | 0.3 | * |
| Zingiber officinale | Rhizome | 2.0 | 5.2 | 1.0 | * |
| Zingiber officinale | Root | 2.0 | 5.2 | 1.8 | * |