Table 3.
Plant-available nutrient concentrations of the soil*
| Element (μg g−1) | Acacia robeorum† | Other Acacia spp. average‡ |
|---|---|---|
| P | 5·0 | 2·5 |
| K | 70·5 | 50·5 |
| S | 13·5 | 2·6 |
| Ca | 385·0 | 172·3 |
| Mg | 79·5 | 50·8 |
| Na | 1·0 | 3·0 |
| Al | 280·0 | 193·3 |
| Fe | 23·0 | 17·0 |
| Mn | 170·0 | 63·5 |
| Cu | 2·9 | 0·3 |
| Zn | 0·2 | 0·2 |
| Mo | 0·02 | 0·01 |
* Plant-available nutrient concentrations of the first 10 cm topsoil were obtained using a Mehlich No. 3 extraction.
† All values for the soil in the natural habitat of A. robeorum are presented as means (n = 2, and each sample was a bulk sample of soil collected under the crowns of three shrubs).
‡ Average values of the soil in the natural habitats of three other Acacia species which grow at nearby sites in the Great Sandy Desert.