Table 2. Soil chemical properties for six studied regions.

Region	Sand (%)	Silt (%)	Clay (%)	Texture	pH	Organic matter (%)	T-N (%)	P2O5 (mg/kg)	K+	Ca2+	Mg2+	CEC (cmol/kg)
Gimje	64.05±10.59a	26.30±8.08c	9.65±2.84b	Sandy loam	4.30±0.05ab	3.04±1.68b	0.10±0.07b	2.98±2.12a	0.15±0.06a	0.45±0.30a	0.12±0.11a	16.41±5.54b
Chungju	23.28±5.49b	55.58±6.99ab	21.15±3.91a	Silty loam	4.17±0.08b	2.19±0.69b	0.09±0.02b	2.28±0.63a	0.13±0.03a	0.25±0.04a	0.04±0.02a	15.24±3.20b
Samcheok	63.07±1.69a	24.90±3.52c	12.03±1.98ab	Sandy loam	4.80±0.41a	2.73±1.34b	0.09±0.04b	2.32±0.31a	0.22±0.05a	1.13±1.35a	0.45±0.27a	17.54±5.27b
Yangpyeong	48.50±11.78a	38.18±9.59bc	13.33±4.99ab	Loam	4.25±0.11b	5.21±3.65ab	0.22±0.16ab	1.42±0.46a	0.21±0.09a	0.59±0.30a	0.11±0.04a	23.71±7.94ab
Hwaseong	57.43±1.39a	31.20±1.76c	11.37±0.81ab	Sandy loam	4.15±0.09b	1.63±0.55b	0.05±0.01b	1.74±0.21a	0.18±0.05a	0.46±0.11a	0.11±0.07a	13.79±2.53b
Pyeongchang	21.37±6.45b	61.10±2.01a	17.53±5.62ab	Silty loam	4.42±0.19ab	9.93±3.38a	0.42±0.14a	1.74±0.71a	0.36±0.21a	1.74±1.53a	0.46±0.47a	38.49±9.52a