Spatial Variability and Geostatistical Analysis of Soil Properties in the Diversified Cropping Regions of Bangladesh Using Geographic Information System Techniques

Table 4

Evaluation performance of kriging map of soil properties through cross-validation.

Variables	MAE	RMSE	R ^2
pH	0.05	0.07	0.80
EC (dSm^−1)	0.13	0.16	0.85
SOC (%)	0.07	0.09	0.85
Total N (%)	0.01	0.01	0.81
Av P (ppm)	12.67	25.04	0.73
Av K (ppm)	5.31	7.90	0.82
Av S (ppm)	4.56	6.47	0.90

pH = soil pH, EC = electrical conductivity, SOC = soil organic carbon, Total N = total nitrogen, Av P = available phosphorus, Av K = available potassium, Av S = available sulfur, MAE = mean absolute error, RMSE = root mean square error, and R² = coefficient of determination.