| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Lycopersicon esculentum | Leaf | -- | -- | * | |
| Lycopersicon esculentum | Seed | -- | -- | * | |
| Brassica oleracea var. botrytis l. | Plant | -- | -- | * | |
| Asparagus officinalis | Shoot | -- | -- | * | |
| Avena sativa | Seed | -- | -- | * | |
| Zea mays | Seed | -- | -- | * | |
| Citrus sinensis | Fruit Juice | -- | -- | Jim Duke's personal files. | |
| Santalum album | Wood | -- | -- | * | |
| Nicotiana tabacum | Leaf | -- | -- | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |