| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Carum carvi | Seed | 71250.0 | 79085.0 | -0.2 | Revised USDA data received 1993. |
| Cicer arietinum | Seed | 13580.0 | 15350.0 | -0.7 | USDA's Ag Handbook 8 and sequelae) |
| Cichorium intybus | Root | 40.0 | 200.0 | -0.9 | USDA's Ag Handbook 8 and sequelae) |
| Cichorium intybus | Leaf | 20.0 | 365.0 | -0.7 | USDA's Ag Handbook 8 and sequelae) |
| Cichorium endivia | Leaf | 40.0 | 644.0 | -0.7 | * |
| Cocos nucifera | Seed | 14250.0 | 26880.0 | -0.6 | USDA's Ag Handbook 8 and sequelae) |
| Colocasia esculenta | Root | 160.0 | 454.0 | -0.8 | * |
| Colocasia esculenta | Leaf | 600.0 | 4185.0 | -0.3 | * |
| Corchorus olitorius | Leaf | 170.0 | 1385.0 | -0.6 | * |
| Cucumis sativus | Fruit | 30.0 | 759.0 | -0.2 | * |
| Cucurbita spp | Fruit | 160.0 | 2530.0 | -0.2 | * |
| Cucurbita pepo | Flower | 90.0 | 1855.0 | 0.9 | USDA's Ag Handbook 8 and sequelae) |
| Cucurbita pepo | Seed | 142580.0 | 153180.0 | 0.3 | USDA's Ag Handbook 8 and sequelae) |
| Cucurbita pepo | Fruit | 130.0 | 1548.0 | -0.2 | USDA's Ag Handbook 8 and sequelae) |
| Cynara cardunculus | Flower | 50.0 | 330.0 | -1.4 | USDA's Ag Handbook 8 and sequelae) |
| Daucus carota | Root | 80.0 | 655.0 | -0.7 | * |
| Dioscorea pentaphylla | Root | 40.0 | 215.0 | -0.9 | * |
| Elettaria cardamomum | Fruit | 8700.0 | 9455.0 | -0.1 | Revised USDA data received 1993. |
| Ficus carica | Fruit | 660.0 | 3159.0 | -0.2 | USDA's Ag Handbook 8 and sequelae) |
| Fragaria spp | Fruit | 520.0 | 6168.0 | -0.2 | USDA's Ag Handbook 8 and sequelae) |