| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Acacia farnesiana | Seed | 600.0 | 2300.0 | -0.5 | * |
| Capsicum annuum | Fruit | 160.0 | 2180.0 | -0.1 | USDA's Ag Handbook 8 and sequelae) |
| Asimina triloba | Fruit | 102.0 | 2124.0 | -0.1 | * |
| Coriandrum sativum | Seed Essent. Oil | -- | 2000.0 | * | |
| Psophocarpus tetragonolobus | Leaf | 440.0 | 1901.0 | 0.6 | * |
| Ceratonia siliqua | Seed | 200.0 | 1820.0 | -0.5 | Wealth of India. |
| Carum carvi | Seed | 1000.0 | 1800.0 | -0.5 | * |
| Zingiber officinale | Root | 170.0 | 1540.0 | 2.8 | USDA's Ag Handbook 8 and sequelae) |
| Zingiber officinale | Rhizome | 170.0 | 1540.0 | 1.0 | * |
| Croton tiglium | Seed | 900.0 | 1500.0 | -0.5 | * |
| Hordeum vulgare | Seed | 130.0 | 1430.0 | -0.5 | Jim Duke's personal files.* |
| Dipteryx odorata | Seed | -- | 1425.0 | -0.5 | * |
| Mentha spicata | Leaf | 200.0 | 1385.0 | 0.3 | USDA's Ag Handbook 8 and sequelae) |
| Abutilon theophrasti | Seed | -- | 1375.0 | -0.5 | Wealth of India. |
| Lycopersicon esculentum | Fruit | 80.0 | 1322.0 | -0.2 | * |
| Benincasa hispida | Fruit | 50.0 | 1280.0 | -0.2 | * |
| Bixa orellana | Seed | 200.0 | 1275.0 | -0.5 | Duke, J. A. and duCellier, J. L. 1993. CRC Handbook of Alternative Cash Crops. CRC Press. Boca Raton, FL 33431. 536 pp. US $312.50. |
| Daucus carota | Seed | 285.0 | 1240.0 | -0.5 | * |
| Abrus precatorius | Seed | -- | 1225.0 | -0.5 | Wealth of India. |
| Carum carvi | Plant | 1100.0 | 1221.0 | -0.3 | * |