Particle-Size Distribution Models for the Conversion of Chinese Data to FAO/USDA System

Table 3

Number of cases as the best model with the smallest AIC value for each soil textural class in T1 schemes†.

Texture‡	AD	F3P	F4P	ML	ONL	ORL	S	VG	VGM	W	SELF	Sum
Sa	64	33	17	9	0	32	73§	0	0	45	47	320
LoSa	163§	39	53	46	3	37	153	0	0	78	54	626
Lo	799§	16	3	24	1	70	380	0	1	36	47	1377
SaLo	979§	56	55	36	22	35	589	0	4	189	312	2277
SaClLo	464§	25	56	23	7	12	229	0	2	31	97	946
SiClLo	244§	22	1	6	0	14	196	1	0	27	0	511
SiLo	137§	9	0	4	0	17	95	0	0	24	0	286
ClLo	1929§	31	0	62	9	72	1024	0	2	80	110	3319
SaCl	108§	4	16	3	0	1	36	0	0	7	6	181
SiCl	236	16	1	55	2	18	264§	3	0	39	0	634
LCl	2086§	33	34	138	1	66	1346	0	1	97	115	3917
HCl	385§	10	21	39	1	23	335	0	0	47	7	868
Sum	7594§	294	257	445	46	397	4720	4	10	700	795	15262

†For example, if the best model according to AIC value of a soil sample is the AD model, the number of the AD model in the table will increase by one. If a model has a big number in a soil textural class, it has advantages in fitting the PSD curve compared to models with small number. The compared eleven models are AD = Anderson model, F3P = Fredlund3P model, F4P = Fredlund4P model, ML = modified logistic growth model, ONL = offset-nonrenormalized lognormal model, ORL = offset-renormalized lognormal model, S = Skaggs model, VG = van Genuchten type model, VGM = van Genuchten type modified model, W = Weibull model, and SELF = self-similar model.
‡Textural classes of ISSS system: Sa = sand, LoSa = loamy sand, Lo = loam, SaLo = sandy loam, SaClLo = sandy clay loam, SiClLo = silty clay loam, SiLo = silt loam, ClLo = clay loam, SaCl = sandy clay, SiCl = silty clay, LCl = light clay, and HCl = heavy clay.
§The biggest number of cases as the best model for the specific soil texture class.