Table 2.
Selected soil chemical properties of ultramafic outcrops in South and Southeast Asia
| Country | Altitude (masl) | pH | Ca:Mg | Ca (exch.) cmol (+) kg−1 | Mg (exch.) cmol (+) kg−1 | K (exch.) cmol (+) kg−1 | K (μg g−1) | P (μg g−1) | P (extract.) μg g−1 | Ni (μg g−1) | Ni (extract.) μg g−1 | References |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sulawesi, Indonesia | – | 5.3–6.3 | 0.9–5.7 | 4.6–13.3 | 11.1–26.2 | 0.05–0.5 | – | – | – | 825–4050 | – | Parry (1985) |
| Sulawesi, Indonesia | 200–300 | 5.8–7.0 | 0.1–1.6 | 0.2–1.6 | 0.5–4.6 | 0.01–0.1 | 3281–6260 | 14.4–237 | 0.23–3.87 | 3730–10,524 | 2.1–30.2 | Van der Ent et al. (2013a) |
| Talaud Island, Indonesia | 60–500 | 6.1–6.4 | 1.6–32 | 0.9–16 | 13.9–27.3 | 0.19–0.38 | – | – | 0.94–6.8 | – | 8.5–37 | Proctor et al. (1994) |
| Sibuyan Island, Philippines | 325–1540 | 4.3–5.5 | 0.3–2.9 | 0.5–3.4 | 0.75–3.64 | 0.04–0.41 | – | – | 0.41–2.07 | – | 1–24 | Proctor et al. (1998) |
| Palawan, Philippines | 50 | 6.8 | 0.24 | 4.27 | 18.1 | 0.32 | – | – | 1.02 | 6900 | 360 | Proctor et al. (1999) |
| Sabah, Malaysia | 400–2900 | 3.8–9.7 | 0.1–136 | 0.003–35 | 0.02–76 | 0.002–0.79 | 0.1–1056 | 4.4–585 | 0.1–32 | 17–9308 | 0.17–442 | Van der Ent (unpublished) |
| Sabah, Malaysia | 180 | 5.3 | 0.62 | 0.86 | 1.38 | 0.17 | – | 201 | 0.34 | 2980 | 10.8 | Brearley (2005) |
| Sabah, Malaysia | 280 | 5.7 | 0.31 | 7.7 | 24.6 | 0.14 | – | 4.1 | – | – | Proctor et al. (1988a) | |
| Ussangoda, Sri Lanka | 15–20 | 5.3–6.2 (4.3–4.9) | 0.6–1.9 (1.4–2.4) | 187–905a (112–212) | 311–456a (60–122) | – | 140–321 (163–350) | – | – | – | 101–151 (29–65) | Weerasinghe and Iqbal (2011), Rajakaruna and Bohm (2002) |
| Ginigalpalessa, Sri Lanka | 70–80 | 5.7–7.4 | 0.1–0.6 | 180–1580a | 2400–3400a | – | 70–230 | – | – | – | 15–180 | Rajakaruna and Bohm (2002) |
| Indikolapalessa, Sri Lanka | 70–80 | 4.7–6.1 | 0.2–2.6 | 395–1863a | 613–2625a | – | 78–1563 | – | – | – | 4–148 | Rajakaruna and Bohm (2002) |
| Yodhagannawa, Sri Lanka | 90–100 | 5.1–5.7 | 0.1–0.2 | 123–138a | 838–1000a | – | 53–75 | – | – | – | 47–79 | Rajakaruna and Bohm (2002) |
| Andaman, India | 50–732 | 6.0–6.8 | – | – | 2300–3600a | – | – | – | – | 3370–9030 | 397–913 | Pal et al. (2007) |
| Andaman, India | 50–732 | 4.4–7.1 | – | – | 2.8–3.9b | – | – | – | – | 244–10,107 | 192–907 | Datta et al. (2015) |
Units are listed under each soil variable except for values with superscripts: a μg g−1; b %