Spatial Variability of Electrical Conductivity of Desert Soil Irrigated with Treated Wastewater: Implications for Irrigation Management

Table 9

Fitted semivariogram models nugget, total sill, range, and nugget to sill ratio, residual sum of square (RSS), and 𝑅²R value of EC_1:1 at 0–20 cm depth during 2010 (best fitted model is in bold).

Model	Nugget	Total sill	Range (m)	Nugget : sill ratio	RSS	𝑅^2
Spherical	0.01	3.51	36	<0.01	3.20	0.58
Exponential	0.68	3.85	249	0.17	2.51	0.69
Gaussian	0.44	3.51	82	0.12	3.14	0.59
Linear	2.45	4.15	—	0.59	3.79	0.50