. 2014 Mar 14;9(3):e90882. doi: 10.1371/journal.pone.0090882

Table 1. Properties of the major soil groups.

Soil group	Soil pH	Soil organic matter (%)	C-to-N ratio	Olsen P (mg kg⁻¹)	Bulk density (g cm⁻³)	Exchangeable Ca (mmol kg⁻¹)	Exchangeable Al (mmol kg⁻¹)	Soil respiration (mg C cm⁻³ h⁻¹)	Soil respiration (g C g SOC⁻¹ h⁻¹)
Pelosol	6.8±1.4^a	7.3±3.3^cd	10.7±0.8^de	28±22^abc	1.10±0.21^a	62±40^a	1.3±4.8a^b	10.2±26.4^bc	4.7±3.4^a
Brown	6.5±1.2^a	10.0±12.5^d	12.2±4.1^e	32±27^abc	1.04±0.33^a	39±27^a	2.1±4.8^b	8.6±11.0^c	7.3±5.6^a
Groundwater gley	6.6±1.2^a	10.9±13.5^d	13.4±4.4^cde	32±34^abc	0.98±0.36^a	42±31^a	2.3±5.4^ab	13.2±24.1^bc	8.1±6.4^a
Surface water gley	5.9±1.3^a	24.9±30.0^bc	14.2±5.5^cd	25±28^bc	0.78±0.43^b	54±49^a	6.3±14.6^ab	14.9±19.2^bc	6.6±5.0^ab
Podzolic	4.9±0.9^b	28.8±27.8^b	17.9±7.0^b	21±20^c	0.57±0.33^c	20±29^b	7.1±8.9a^b	17.9±32.9^bc	5.1±3.9^b
Lithomorphic	6.0±1.4^a	35.1±32.8^b	16.2±6.4^bc	41±69^ab	0.56±0.38^c	42±39^a	3.4±5.6^ab	20.8±33.0^b	6.4±5.6^ab
Peat	4.6±0.6^b	75.9±27.9^a	24.1±8.5^a	44±51^a	0.20±0.21^d	46±50^a	9.6±38.0^a	43.1±37.1^a	4.5±3.8^b
ANOVA	***	***	***	^**	***	***	^**	***	***

Values are expressed on a dry weight basis and represent mean ± SD.

** and *** indicate significant differences between soil groups at the P<0.01 and P<0.001 levels respectively. Superscript letters indicate significant between soil groups at the P<0.05 level.