Table 1. The soil particle distribution of Korea forest soils by regions.

Soil horizon	Region	No. of sample	Soil particle distribution
			Sand (%)	Silt(%)	Clay(%)
A	Gangwon	79	47.7 ± 11.3	38.7 ± 8.9	13.6 ± 4.2
	Gyonggi	95	46.6 ± 13.5	38.1 ± 9.4	15.3 ± 7.0
	Gyungnam	109	32.4 ± 17.0	47.9 ± 14.1	18.8 ± 6.9
	Gyungbuk	72	48.9 ± 13.6	38.7 ± 10.6	12.4 ± 4.8
	Jeonnam	92	39.9 ± 15.6	42.2 ± 12.5	17.9 ± 5.5
	Jeonbuk	120	42.0 ± 18.5	41.5 ± 15.8	16.5 ± 5.5
	Chungnam	195	47.8 ± 16.9	38.4 ± 13.7	13.8 ± 6.2
	Chungbuk	97	48.0 ± 18.2	39.9 ± 15.2	12.1 ± 5.6
	Jeju	54	22.5 ± 12.3	53.5 ± 11.6	24.0 ± 7.6
	Mean		42.9 ± 17.5	41.4 ± 13.7	15.6 ± 6.7
B	Gangwon	77	46.6 ± 13.6	37.7 ± 10.7	15.7 ± 5.4
	Gyonggi	94	48.8 ± 14.5	34.3 ± 9.9	16.9 ± 7.1
	Gyungnam	142	35.1 ± 18.8	42.8 ± 13.8	22.1 ± 8.4
	Gyungbuk	73	16.2 ± 15.3	39.7 ± 12.1	14.0 ± 5.3
	Jeonnam	91	40.8 ± 14.7	39.3 ± 11.1	19.9 ± 5.9
	Jeonbuk	121	44.4 ± 18.9	37.5 ± 15.2	18.1 ± 6.4
	Chungnam	191	47.4 ± 17.3	36.7 ± 12.9	15.9 ± 7.4
	Chungbuk	96	48.6 ± 19.3	38.0 ± 14.7	13.4 ± 7.1
	Jeju	53	28.5 ± 18.3	51.8 ± 15.2	19.6 ± 8.4
	Mean		43.5 ± 18.1	39.1 ± 13.6	17.4 ± 7.5