Authors : Mahboub Saffari, Jafar Yasrebi, Vahid Reza Saffari, Mostafa Emadi, Masomeh Moazallahi and Hamed Fathi
Abstract: Evaluation agricultural land management practices require a through knowledge of soil spatial variability and understand their relationship. The objectives of this study was to estimate, the distribution of Zinc (Zn) fractions in calcareous soils in Bajgah district, Fars province, Southern Iran, for recognize the mobility and bioavailability of Zn chemical fractions in the field scale. Five different kinds of chemical forms of Zn in the surface soil of this area analyzed by the method of a combination of geostatistic method and sequential extraction. Soil properties will have a major effect on elements mobility. A sequential extraction procedure was used to fractionate chemical forms of Zn. The forms determined were exchangeable, sorbed, organic, carbonate, residual and sum of forms. The spatial distribution and spatial dependence level varied within location. The range of spatial dependence was found to vary within soil parameters. Generally, exchangeable form had the shortest range of spatial dependence (70.50 m) and residual Zn had the longest (368.10 m).
Mahboub Saffari, Jafar Yasrebi, Vahid Reza Saffari, Mostafa Emadi, Masomeh Moazallahi and Hamed Fathi, 2009. Geostatistical Investigation of Sequentially Extracted Zn Forms at Field Scale in Highly Calcareous Soils. Research Journal of Biological Sciences, 4: 866-873.