| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Zizyphus spina-christi | Fruit | -- | 1.4 | -0.8 | * |
| Zizyphus jujuba | Fruit | 0.3 | 2.4 | -0.6 | * |
| Zingiber officinale | Root | 0.2 | 3.1 | -0.2 | * |
| Zingiber officinale | Rhizome | -- | 5.0 | -0.1 | * |
| Zea mays | Silk Stigma Style | -- | 1.5 | -1.0 | * |
| Zea mays | Fruit | 1.0 | 4.0 | -0.2 | * |
| Zea mays | Cob | 1.0 | 3.0 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. | |
| Yucca baccata | Bark | -- | 7.0 | 1.3 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Yucca baccata | Root | 1.4 | 6.7 | 0.6 | * |
| Xanthosoma sagittifolium | Root | 0.3 | 0.9 | -0.7 | * |
| Vitis vinifera | Plant | 0.5 | 3.2 | -0.6 | * |
| Vitis vinifera | Stem | -- | 6.9 | -0.5 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Vigna aconitifolia | Seed | 0.9 | 1.0 | -1.0 | * |
| Vigna unguiculata | Seed | 1.5 | 4.5 | 0.4 | USDA's Ag Handbook 8 and sequelae) |
| Vigna unguiculata | Shoot | 1.8 | 17.0 | -0.1 | * |
| Vigna subterranea | Seed | 1.4 | 1.6 | -0.7 | * |
| Vigna mungo | Seed | 2.0 | 2.2 | -0.5 | * |
| Vigna unguiculata | Seed | 2.3 | 2.6 | -0.4 | USDA's Ag Handbook 8 and sequelae) |
| Vigna radiata | Sprout Seedling | 1.0 | 15.0 | 0.2 | USDA's Ag Handbook 8 and sequelae) |
| Vigna angularis | Seed | 1.8 | 3.0 | -0.2 | * |