| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Raphanus sativus | Root | 0.7 | 14.5 | 1.5 | * |
| Ribes rubrum | Fruit | 1.0 | 4.0 | -0.7 | * |
| Ribes nigrum | Fruit | 1.0 | 4.0 | -0.7 | USDA's Ag Handbook 8 and sequelae) |
| Ribes uva-crispa | Fruit | 1.0 | 7.0 | -0.2 | * |
| Rosmarinus officinalis | Leaf | 3.4 | 10.0 | -0.5 | USDA's Ag Handbook 8 and sequelae) |
| Rubus idaeus | Fruit | 0.5 | 4.3 | -0.7 | Revised USDA data received 1993. |
| Secale cereale | Seed | -- | 3.0 | -0.7 | USDA's Ag Handbook 8 and sequelae) |
| Solanum tuberosum | Tuber | 2.5 | 12.5 | * | |
| Solanum melongena | Fruit | 0.9 | 11.6 | 0.6 | * |
| Spinacia oleracea | Plant | 1.9 | 24.0 | 1.0 | USDA's Ag Handbook 8 and sequelae) |
| Vaccinium corymbosum | Fruit | 0.3 | 2.5 | -1.0 | * |
| Vaccinium macrocarpon | Fruit | 0.6 | 5.4 | -0.5 | USDA's Ag Handbook 8 and sequelae) |
| Vigna radiata | Sprout Seedling | 0.8 | 11.0 | 1.0 | USDA's Ag Handbook 8 and sequelae) |
| Vigna unguiculata | Seed | 0.67 | 4.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Vigna radiata | Seed | 3.7 | 4.3 | -0.2 | USDA's Ag Handbook 8 and sequelae) |
| Vigna unguiculata | Seed | 3.7 | 4.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Vitis vinifera | Fruit | 1.0 | 6.0 | -0.4 | * |
| Zea mays | Seed | 1.0 | 3.0 | -0.7 | * |
| Zingiber officinale | Root | 1.6 | 8.7 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Zingiber officinale | Rhizome | 1.6 | 8.7 | * |