TY - JOUR ID - 73906 TI - Correlation Among K Forms with Soil Physical-Chemical Properties and Clay Mineral Diversity in Some Soils of Khuzestan JO - Iranian Journal of Soil and Water Research JA - IJSWR LA - en SN - 2008-479X AU - jafari, siroos AD - Associate professor of soil science,Agriculture college, Agriculture and Natural Resources University of Khouzestan, mollasani, ahvaz, Iran Y1 - 2019 PY - 2019 VL - 50 IS - 7 SP - 1721 EP - 1733 KW - clay KW - mineralogy KW - potassium KW - fixation KW - release DO - 10.22059/ijswr.2019.274818.668112 N2 - The knowledge about K forms and its distribution in different soils can help to apply properly K fertilizers. This study was performed to investigate the different K forms in the soil and their relationship with physical-chemical properties and clay mineral diversity of the soil. The results showed that the amount of soluble K had negative correlation with clay content but exchangeable or available K value had positive correlation with clay content. Also, the fixed K value had good correlation with type and among clay content in these soils. Structural K had positive and significant correlation with Fe and clay content but negative correlation with gypsum. Total K had good correlation with clay content and consequently with Fe, Al, and Si that are the main performed elements of the clay particles. The amount of K in the soil was increased with increasing of illite content but it was decreased with increasing the chlorite and palygorskite. The results showed a significant difference between the K values with the presence and absence of OM, CCE, and gypsum in the soils. Generally speaking, the available K content was corresponded to the parent material (clay mineral type), cultivation type and age, heavy irrigation and leaching which causes a reduction in illite clay mineral in these soils. UR - https://ijswr.ut.ac.ir/article_73906.html L1 - https://ijswr.ut.ac.ir/article_73906_4e86f1c6bd619934292eece8f6682cb8.pdf ER -