Saadipour, C. , , Roodpeyma, M. , , Karami, A. , , Davatgar, N. , and Salahedin, S. M. . "Evaluation of Three Geostatistical Methods for Estimation of Some Soil Physicochemical Properties and the Effect of Sampling Density on Variogram Parameters", Iranian Journal of Soil Research, 30, 4, 2017, 457-473. doi: 10.22092/ijsr.2017.109263