. 2017 Apr 3;58:18. doi: 10.1186/s40529-017-0167-9

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Malaysia	400–2900	3.8–9.7	0.1–136	0.003–35	0.02–76	0.002–0.79	0.1–1056	4.4–585	0.1–32	17–9308	0.17–442	Van der Ent (unpublished)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)	187–905^a (112–212)	311–456^a (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	180–1580^a	2400–3400^a	–	70–230	–	–	–	15–180	Rajakaruna and Bohm (2002)
Indikolapalessa, Sri Lanka	70–80	4.7–6.1	0.2–2.6	395–1863^a	613–2625^a	–	78–1563	–	–	–	4–148	Rajakaruna and Bohm (2002)
Yodhagannawa, Sri Lanka	90–100	5.1–5.7	0.1–0.2	123–138^a	838–1000^a	–	53–75	–	–	–	47–79	Rajakaruna and Bohm (2002)
Andaman, India	50–732	6.0–6.8	–	–	2300–3600^a	–	–	–	–	3370–9030	397–913	Pal et al. (2007)
Andaman, India	50–732	4.4–7.1	–	–	2.8–3.9^b	–	–	–	–	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 %