| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Psophocarpus tetragonolobus | Leaf | 20.0 | 86.0 | -1.4 | * |
| Psophocarpus tetragonolobus | Tuber | 10.0 | 23.0 | * | |
| Raphanus sativus | Seed | -- | -- | * | |
| Rumex crispus | Root | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Sinapis alba | Seed | 104194.0 | 117064.0 | 0.4 | * |
| Tropaeolum majus | Seed | -- | 72000.0 | -0.1 | * |
| Vigna unguiculata | Shoot | 80.0 | 783.0 | USDA's Ag Handbook 8 and sequelae) | |
| Vigna unguiculata | Fruit | 130.0 | 1070.0 | USDA's Ag Handbook 8 and sequelae) | |
| Vigna unguiculata | Seed | 120.0 | 753.0 | -0.8 | USDA's Ag Handbook 8 and sequelae) |
| Vigna unguiculata | Shoot | 80.0 | 783.0 | * | |
| Vigna unguiculata | Seed | 120.0 | 753.0 | -0.8 | * |
| Vitis vinifera | Seed | -- | -- | * |