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

Table 1

Descriptive statistics of soil attributes in the vineyard and other uses in the region studied.

Variable	Unit	Vineyard				Other uses
		Minimum	Maximum	Average	STD	Minimum	Maximum	Average	STD
Organic matter	g L^−1	17.0	55.0	34.4	10.9	13.0	82.0	33.0	14.2
CEC	cmolc L^−1	6.07	31.2	12.2	6.49	4.55	15.1	8.05	2.64
Base saturation	%	37.0	95.0	67.5	16.8	10.0	93.0	42.9	21.0
Clay	g kg^−1	150	313	223	41.8	125	450	254	66.9
Silt	g kg^−1	75.0	226	142	38.7	74.0	243	154	41.7
Sand	g kg^−1	562	729	635	41.9	346	788	591	82.9
CuT	mg kg^−1	10.0	40.5	20.7	8.41	4.65	80.3	13.4	11.7
ZnT	mg kg^−1	14.3	243	53.4	43.0	6.48	225	45.7	40.2
pH CaCl2		4.20	6.50	5.16	0.62	3.70	6.40	4.70	0.63
pH CaCl2 after acidified		3.63	6.97	4.96	0.92	3.33	6.60	4.31	0.70
CuDTPA	mg kg^−1	2.80	15.5	6.79	3.27	1.30	15.4	2.69	2.18
CuDTPA after acidified	mg kg^−1	2.59	22.1	9.11	4.89	1.26	20.0	3.47	2.82
ZnDTPA	mg kg^−1	4.80	25.0	11.8	5.63	1.40	24.8	5.39	4.75
ZnDTPA after acidified	mg kg^−1	5.02	29.9	13.7	6.47	0.97	28.0	5.64	5.37
CuCaCl	mg kg^−1	0.01	0.12	0.08	0.03	0.01	0.61	0.06	0.10
CuCaCl after acidified	mg kg^−1	0.03	0.08	0.05	0.01	0.02	1.23	0.07	0.19
ZnCaCl	mg kg^−1	0.01	2.58	0.73	0.73	0.01	8.97	1.17	1.67
ZnCaCl after acidified	mg kg^−1	0.01	3.11	1.37	1.11	0.03	4.54	1.09	1.05

STD: standard deviation.