Geotechnologies and Soil Mapping for Delimitation of Management Zones as an Approach to Precision Viticulture

Table 3

Statistics for variables related to the 108 soil samples (Ap horizon).

Variable	Unit	Mean	Range	VC (%)
Pebbly (>20 mm)	g⋅kg^−1	50	0–270	132
Gravel (2–20 mm)	g⋅kg^−1	160	0–410	69
Fine land (<2 mm)	g⋅kg^−1	790	480–1000	17
C (organic)	g⋅kg^−1	20	8–46	32
N	g⋅kg^−1	2	0.5–4.4	34
pH (in water)		6	5–7.4	7
Al	cmolc⋅kg^−1	0.01	0–0.5	441
Ca	cmolc⋅kg^−1	11	4–23	32
Mg	cmolc⋅kg^−1	2.4	1.2–4.5	31
K	cmolc⋅kg^−1	0.6	0.1–1.1	34
P	cmolc⋅kg^−1	86	9–423	85
Bases saturation	%	76	29–97	17

VC = variation coefficient (standard deviation expressed as percentage of the mean).