| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Cocos nucifera | Seed | 7610.0 | 14355.0 | -1.2 | USDA's Ag Handbook 8 and sequelae) |
| Ocimum basilicum | Leaf | -- | 15650.0 | -1.2 | USDA's Ag Handbook 8 and sequelae) |
| Elaeagnus angustifolia | Root | -- | 0.48 | -1.3 | Wheller, C. T., Bond, G. 1970. The Amino Acids of Non-Legume Root Nodules. Phytochemistry 9: 705-708. Dept. Botany Univ. Glasgow Glasgow, Scotland. |
| Castanea dentata | Seed | 6204.0 | 11043.0 | -1.3 | * |
| Theobroma cacao | Seed | -- | 10200.0 | -1.3 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |
| Vigna radiata | Sprout Seedling | 1610.0 | 16912.0 | -1.3 | USDA's Ag Handbook 8 and sequelae) |
| Panax quinquefolius | Plant | 396.0 | 4450.0 | -1.3 | * |
| Castanea mollisima | Seed | 5393.0 | 9600.0 | -1.4 | * |
| Pisum sativum | Shoot | -- | 70.0 | -1.4 | * |
| Rosmarinus officinalis | Leaf | 3610.0 | 11200.0 | -1.4 | USDA's Ag Handbook 8 and sequelae) |
| Castanea sativa | Seed | 2558.0 | 5628.0 | -1.5 | * |
| Pachyrhizus erosus | Tuber | 820.0 | 7560.0 | -1.6 | * |
| Momordica charantia | Seed | -- | 212.0 | -1.8 | Jim Duke's personal files. |
| Linum usitatissimum | Seed | -- | 1.153 | -1.8 | * |
| Allium sativum var. sativum | Leaf | -- | -- | * | |
| Myrica cerifera | Root | -- | -- | * | |
| Glycine max | Shoot | -- | -- | * | |
| Silybum marianum | Seed | -- | -- | * | |
| Huperzia spp | Plant | -- | -- | * | |
| Cryptotaenia japonica | Shoot | -- | -- | * |