Assessment of Copper and Zinc in Soils of a Vineyard Region in the State of São Paulo, Brazil

Table 6

Semivariograms parameters for spatial distributions of Cu and Zn in soils from a vineyard region of São Paulo state: nugget effect (𝐶₀), sill (𝐶), range (𝐴), and dependency degree (GD).

Variable	𝐶0	𝐶	𝐴 (m)	GD (%)	Model
CuDTPA	0.94	6.85	125.8	86	Spherical
CuDTPA acidified	2.36	12.80	125.6	82	Spherical
ZnDTPA	22.00	59.34	966.0	63	Gaussian
ZnDTPA acidified	29.70	107.40	1204.0	72	Exponential
CuT	51.66	102.18	290.5	49	Spherical
ZnT	890.00	5890.00	1666.0	85	Gaussian
CuCaCl	0.0008	0.0026	854.0	69	Spherical
CuCaCl acidified	0.0002	0.0002	—	—	Nugget effect
ZnCaCl	0.64	0.64	—	—	Nugget effect
ZnCaCl  acidified	0.13	0.13	—	—	Nugget effect