Table 1.
Changes in soil chemical properties Qureus mongolica forest in the northern slope of Namsan(Mt.)

Year		pH (1:5)	Available phosphate (mg/kg)	Organic matter (%)	Exchangeable cation(cmol/kg)
					Ca++	Mg++	K+	Na+
1986		4.44	45.20	3.57	1.00	0.25	0.32	-
1993		4.70	10.90	3.12	0.57	0.18	0.15	-
2000		4.49	6.61	3.94	2.28	0.87	0.21	0.21
2005		4.89	1.69	3.14	0.14	0.16	0.31	0.14
2007		4.79	1.76	4.60	1.66	0.16	0.23	0.08
2016		4.40	16.88	3.57	0.68	0.17	0.11	0.07
2016	Soil 1	4.47	18.66	2.05	0.16	0.07	0.22	0.06
	Soil 2	4.65	15.46	1.11	0.87	0.09	0.09	0.06
	Soil 3	4.18	19.19	8.49	1.62	0.42	0.11	0.07
	Soil 4	4.31	14.21	2.61	0.06	0.08	0.01	0.09
Acid soil A layer*	5.48	25.60	4.49	2.44	1.01	0.23	0.22
	Acid soil B layer*	5.52	11.90	2.03	1.64	1.03	0.15	0.21

Jeong, J. H. and others. (2002) Physico-chemical Properties of Korean Forest Soils by Regions. Jouranl of Korean Forestry Society, 91(6): 694-700.