TY - JOUR T1 - Study of Soil Change and Evolution-Landscape of Chaldoran Region, Northwest of Iran TT - مطالعه تغییر و تحول خاک - سیمای اراضی منطقه چالدران، شمال غربی ایران JF - JSTNAR JO - JSTNAR VL - 26 IS - 2 UR - http://jstnar.iut.ac.ir/article-1-4101-en.html Y1 - 2022 SP - 135 EP - 153 KW - Drainage KW - Land use KW - Soil evolution KW - A-CN-K diagram N2 - To study the soil-landscape change in the Chaldoran region, 9 representative soil profiles were studied in 5 dominant geomorphic units of the study area including piedmont plain, mantled pediment, alluvial fan, plain, and flood plain. The results showed that the accumulation of pedogenic carbonate in some soils was concretion and light in color. In control soils in the piedmont plain (profile 5 and 7), mantled pediment (profile 6), and flood plain (profile 8) clay transferred from the surface horizons and accumulated in the lower horizon, due to relatively good rainfall in the region and distinct dry and wet seasons has led to the formation of argillic horizons along with the formation of crust on the surfaces of aggregates and building units and has formed the Alfisoils order. Mineralogical results showed the presence of chlorite, illite, kaolinite, and smectite minerals. According to the evidence, illite, chlorite, and kaolinite minerals were inherited and smectite minerals were formed due to weathering and evolution of illite, chlorite, or palygorskite minerals. Also, the results of the CIA index in the region indicated that the soils of the region are in the stage of weak to moderate weathering. In general, the results indicated the critical role of drainage, land use, and parent materials in the soils of the study area. M3 10.47176/jwss.26.2.43471 ER -