Ca	Calcium
CaSP	Clustering and smoothing platform
CEC	Cation exchange capacity
DBI	Davies–Bouldin index
DBSCAN	Density-based spatial clustering of applications with noise
DGPS	Differential global positioning system
FCM	Fuzzy C-means
K	Exchangeable potassium
MC	Moisture content
Mg	Magnesium
MS	Mean-shift
MZ	Management zone
Na	Sodium
NDVI	Normalized difference vegetation index
OC	Organic carbon
P	Exchangeable phosphorous
PA	Precision agriculture
Sil.	Silhouette
vis-NIR	Visible-near-infrared
VRI	Variance reduction index