Simulation and Prediction of Ion Transport in the Reclamation of Sodic Soils with Gypsum Based on the Support Vector Machine

Table 1

Physical and chemical properties of the soil.

(a)

Exchangeable cations/cmolc·kg^−1					Soil bulk	pH1∶5
Na^+	K^+	Ca^2+	Mg^2+	CEC	Density/g·cm^−3
8.65	0.60	0.50	1.27	11.02	1.45	9.15

(b)

Soluble cations/mmoLc·l^−1				Soluble anions/mmolc·l^−1
Na^+	K^+	Ca^2+	Mg^2+	Cl^−	SO4^2−	HCO3^−	CO3^2−
303.15	5.18	3.33	3.33	193.33	50.00	51.67	20.00

(c)

Particle size distribution/%			EC1∶5
2.0–0.02	0.02–0.002	<0.002	dS·m^−1
23.2	0.95	42.1	0.95