“…Conditional probability can be applied as an excellent tool to investigate the soil-landscape ٢٠١ relationship (Bagheri Bodaghabadi and Toomanian, 2019;Hawinkel et al, 2016, Taalab et al, ٢٠٢ 2015. Presume that two events, A and B, are given in a similar sample space, and the event ٢٠٣ probability of B is greater than zero, i ٢٠٤ has occurred (i.e., P (A|B)) is equal to the ٢٠٥ and B (i.e., P (A∩B)), to the unconditional probability B (i.e., ٢٠٦ ٢٠٧ Now, if it is supposed that each soil ( ٢٠٩ landscape, based on conditional probability, the probability ٢١٠ of landform unit (Gj) is observed, can be shown as follows: ٢١١ ٢١٢ It is also possible to show the probability of ٢١٤ observed as follows: ٢١٥ ٢١٦ ٢١٧ When the probability of the existence of soil ( ٢١٨ (Gj) is observed, this means that the soil ( ٢١٩ the closer the P(Si|Gj) average of all map units ٢٢٠ to delineate units or soil types.…”