| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Beta vulgaris | Root | 1.0 | 80.0 | 2.1 | * |
| Brassica napus var. napobrassica | Root | 2.5 | 30.0 | 0.2 | ACTA AGRIC SCAND SUPPL 22: 1980 |
| Brassica oleracea var. italica | Leaf | 1.0 | 85.0 | 0.6 | * |
| Brassica oleracea var. botrytis l. | Flower | 1.0 | 76.0 | 1.2 | * |
| Brassica rapa | Root | 2.0 | 20.0 | -0.1 | * |
| Brassica oleracea var. gemmifera | Stem | -- | 21.0 | -0.7 | * |
| Brassica oleracea var. botrytis l. | Leaf | 1.0 | 85.0 | 0.6 | * |
| Brassica napus var. napobrassica | Leaf | -- | 52.0 | -0.3 | * |
| Brassica pekinensis | Leaf | 13.3 | 21.0 | -1.1 | * |
| Brassica oleracea var. gemmifera | Leaf | -- | 57.0 | -0.1 | * |
| Brassica napus var. napobrassica | Stem | -- | 24.0 | -0.5 | * |
| Brassica oleracea var. italica | Stem | -- | 21.0 | -0.7 | * |
| Brassica oleracea var. capitata l. | Leaf | 1.0 | 145.0 | 2.3 | * |
| Brassica oleracea var. botrytis l. | Stem | -- | 21.0 | -0.7 | * |
| Capsicum frutescens | Fruit | 4.0 | 17.0 | -0.5 | Betting on Boron, Unpublished draft by J. A. Duke on file at USDA, draft and papers relating to boron percentages. Includes Internat. Z. Vit. Ern. Forschung 43:1973 (boron). |
| Capsicum annuum | Fruit | 1.0 | 74.0 | 0.7 | * |
| Carica papaya | Fruit | 5.0 | 15.0 | -0.5 | * |
| Carya ovata | Shoot | 2.0 | 63.0 | 0.0 | * |
| Carya ovata | Seed | -- | 8.5 | -0.7 | * |
| Carya illinoensis | Seed | 6.5 | 7.6 | -0.8 | * |