Table 6: Semivariograms parameters for spatial distributions of Cu and Zn in soils from a vineyard region of São Paulo state: nugget effect ( ), sill ( ), range ( ), and dependency degree (GD).

Variable (m)GD (%)Model

CuDTPA0.946.85125.886Spherical
CuDTPA acidified2.3612.80125.682Spherical
ZnDTPA22.0059.34966.063Gaussian
ZnDTPA acidified29.70107.401204.072Exponential
CuT51.66102.18290.549Spherical
ZnT890.005890.001666.085Gaussian
CuCaCl0.00080.0026854.069Spherical
CuCaCl acidified0.00020.0002Nugget effect
ZnCaCl0.640.64Nugget effect
ZnCaCl  acidified0.130.13Nugget effect