%0 Journal Article %T A Study of Magnetic Susceptibility in Some Aquic and Non-aquic Soils of Fars Province %J Iranian Journal of Soil and Water Research %I University of Tehran %Z 2008-479X %A Owliaei, H. R. %A Adhami, E. %A Ejraei, A. K. %A Najafi Gheiri, M. %A Rajaei, M. %D 2011 %\ 01/21/2011 %V 41 %N 2 %P 147-159 %! A Study of Magnetic Susceptibility in Some Aquic and Non-aquic Soils of Fars Province %K .. %K Drainage conditions %K Heat treatment. %K Iron oxide %K Magnetism %R %X Soil drainage conditions significantly affect the chemical properties of soil, particularly type and the extent of iron oxides. Soil magnetic susceptibility (?) has a close relationship with drainage conditions. Eight soil profiles, in four regions of Fars province, with aquic and non-aquic soil moisture regimes were studied to determine the effect of drainage conditions on ? and on chemical forms of Fe-oxide. A positive and significant correlation was noticed between ? and Fed. Aquic soils bore distinctly lower ?s than non-aquic soils (19.9 vs. 32.5). Magnetic susceptibility of surface horizons was greater than that of sub-surface horizons in most of the soils (31 vs. 19.6), which is probably a result of pedogenic formation of ferrimagnetic minerals in soil surface. Aquic and non-aquic soil lost 41 and 64 percent of their ? after CBD extraction, reflecting differences in the source of ?. Sequential heating of soil samples upto 550 °C resulted in more enhancement of ?, in aquic soils as compared with non-aquic soils, (451% vs. 155%) which was attributed to the conversion of canted antiferromagnetic minerals to ferromagnetic ones. The value of ? decreased when heated from 550 to 700 °C (about 100% in both soil groups). %U https://ijswr.ut.ac.ir/article_21864_7d31bda02eb45be68831963c7f8a574f.pdf