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Analysis of soil properties

SY Sh. Yeilagi
SR Salar Rezapour
FA F. Asadzadeh
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Soil pH, electrical conductivity (EC), soil organic carbon (SOC), cation exchange capacity (CEC), and calcium carbonate equivalent CaCO3 (CCE) were determined by procedures described by Sparks et al.18. Total N and available P were estimated using the Kjeldahl approach19 and spectrophotometry methods20. Soluble and exchangeable cations were measured by the method of saturation extract and 1 N NH4OAc, respectively21. Sodium absorption ratio (SAR) was computed using the concentration of solution Na, Ca, and Mg, and exchangeable sodium percentage (ESP) was computed using exchangeable Na and CEC values22.

Available and total fractions of Zn, Cu, Cd, Pb, and Ni were derived by diethylene-triamine pentaacetic acid (DTPA)23 and concentrated nitric acid24, respectively. Then, the concentration of the metal was measured by an atomic absorption spectrophotometer (Shimadzu AA-6300).

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