. 2015 Apr 9;5:9665. doi: 10.1038/srep09665

Table 3. Exchangeable cations [cmol(+) kg⁻¹] of seaweed biochar. NQ – not quantified. South Sulawesi and Java (Indonesia).

Species	Origin	Al	Ca	K	Mg	Na
Gracilaria	South Sulawesi	<0.1	22	280	13	100
Gracilaria	Java	<0.1	38	270	18	140
Eucheuma	South Sulawesi	<0.1	22	330	78	340
Eucheuma	Java	<0.1	19	390	100	330
Kappaphycus	South Sulawesi	<0.1	56	210	60	310
Kappaphycus	Kiribati	<0.1	12	26	50	760
Saccharina	China	<0.1	4	320	26	200
Saccharina	Korea	<0.1	12	120	52	430
Sargassum	China	<0.1	56	270	61	220
Sargassum	Indonesia	<0.1	51	370	79	230
Undaria	China	<0.1	19	13	45	620
Undaria	Korea	<0.1	94	420	59	260
Ligno-cellulosic³	NA	NQ	21.8	12	NQ	1.09
Microalgae¹¹	NA	NQ	9.4–18.3	12.2–13.9	6.0–10.7	36.6–58.8

Table 3. Exchangeable cations [cmol(+) kg−1] of seaweed biochar. NQ – not quantified. South Sulawesi and Java (Indonesia).