This paper presents the comparison of the earth resistivity obtained from the measurements made with the three-electrode and four-electrode fall-of-potential techniques. The ${ ho}-a$ curve obtained from Wenner four-electrode method in undisturbed earth is in good agreement with the ${ ho}-l$ curve obtained from the three-electrode method based on the fall-of- potential method. However, The ${ ho}-a$ curve in disturbed earth with moisture and freezing is significantly different with the ${ ho}-l$ curve. The ${ ho}-a$ curve is considerably sensitive to the freezing and the moisture present in the earth surface compared to the ${ ho}-l$ curve. Thus to determine the actual earth resistivity, it is necessary to take into account the earth surface conditions when measuring the earth resistivity.