We examine the potential of magnetic susceptibility measurements to discriminate different soil drainage classes in the Gandoman region, central Iran. Four soil drainage classes, comprising poorly drained (PD), somewhat poorly drained (SPD), moderately well drained (MWD) and well drained (WD), were identified, and a total number of 48 soil profiles were excavated and studied. The soil samples were collected from all studied profiles from the genetic horizons individually. Magnetic susceptibility was measured at both low (0.46 kHz) and high (4.6 kHz) frequencies. The crystallized and amorphous iron forms were also measured using citrate-bicarbonate-dithionite solution and oxalate-ammonium extracts, respectively. The highest magnetic susceptibility was observed in WD soils, whereas the lowest susceptibility was observed in PD soils. The results of the predictor models developed by discriminate analysis showed that the use of magnetic susceptibility and iron forms could correctly predict about 90.9, 78.6, 85.7 and 88.9% of all profiles in WD, MWD, SPD and PD classes, respectively. Overall, the results indicate that magnetic susceptibility could be applied as a marker for the discrimination of drainage classes in the study area. Magnetic susceptibility is thus a quickly accessible and low-cost indicator for soil drainage classes for landownerships and subsequent analyses.

我们检查了磁化率测量值以区分伊朗中部Gandoman地区不同土壤排水类别的潜力。确定了四种土壤排水类型，包括排水不良（PD），排水不良（SPD），排水良好（MWD）和排水良好（WD），并研究了48种土壤剖面。从遗传视野的所有研究剖面中分别收集土壤样品。在低频（0.46 kHz）和高频（4.6 kHz）下都测量了磁化率。还分别使用柠檬酸盐-碳酸氢盐-连二亚硫酸盐溶液和草酸盐-铵萃取物测量了结晶和非晶态铁的形式。在WD土壤中观察到最高的磁化率，而在PD土壤中观察到最低的磁化率。通过判别分析开发的预测器模型的结果表明，使用磁化率和铁的形式可以分别正确预测WD，MWD，SPD和PD类的所有剖面的90.9％，78.6％，85.7％和88.9％。总体而言，结果表明磁化率可作为区分研究地区排水类别的标志。因此，磁化率是用于土地所有权和后续分析的土壤排水类别的一种快速可访问且低成本的指标。结果表明，磁化率可以作为区分研究地区排水类别的标志。因此，磁化率是用于土地所有权和后续分析的土壤排水类别的一种快速可访问且低成本的指标。结果表明，磁化率可以作为区分研究地区排水类别的标志。因此，磁化率是用于土地所有权和后续分析的土壤排水类别的一种快速可访问且低成本的指标。