Fig. 4 (left) displays the whole rock Kfd values versus Klf, as suggested by Heller et al. (1991). The plot shows that Kfd increases with Klf (magnetic enhancement) as was observed for the first time in Chinese loess sequences. The Kfd values almost "saturate" at ~ 9 to 10% when Klf reaches maximum values above 50010-6 [SI] whereas the majority of samples is characterised by Klf values of less than 40010-6 [SI] while most Kfd values are ranging from 0 to 3 [%]. In Fig. 4 (right), KARM vs. Klf is displayed. The ratio of KARM to Klf was introduced as a magnetic granulometry factor by Banerjee et al. (1981). This ratio has high values for single-domain (SD) and pseudo-singledomain (PSD) grains and low values in the case of multi-domain (MD) grains. The plot of KARM versus Klf is sensitive to the grain size and the concentration of magnetite; the higher the ratio, the steeper the slopes for different data groups and the smaller the grain size (Fig. 4, right). The soils are characterised by the steepest gradient, which indicates small SD grains near the threshold of SP grains in the soils. The gentlest gradient is located in the sandy part of the profile, indicating the prevalence of MD grains.