Vario macro cube cn

The selected measured soil characteristics included: pH in 1 mol KCl, clay (φ < 0.002 mm), silt (φ = 0.002–0.05 mm), sand (φ = 0.05–2.0 mm), total nitrogen (TN), total carbon (TC) and total organic carbon (TOC) contents. The pH was measured potentiometrically in a 1:2.5 (m V⁻¹) soil suspension in 1 mol L⁻¹ KCl solution (PNISO10390, 1997). The clay content was analyzed via the aerometric method (PN-R-04032, 1998), while TN and TC were determined in a Vario Macro Cube CN elemental analyzer (Elementar Analysensysteme GmbH, Langenselbold, Germany) after dry combustion. TOC content was determined after sulfochromic oxidation followed by titration of the excess K₂Cr₂O₇ with FeSO₄(NH₄)₂SO₄·6H₂O (PN-ISO 14235, 2003).

The selected soil physicochemical properties included analysis of pH_KCl, clay content (φ < 0.002 mm), total carbon content (TC), total organic carbon content (TOC) as well as total nitrogen content (TN) were measured. The pH was determined according to the PN-ISO 10,390 by potentiometric method and soil suspension in 1 mol l⁻¹ KCl solution (1:2.5 m V⁻¹). Clay content was analyzed according to the PN-R-04032 via the aerometric method, while TN and TC were determined by dry combustion in a Vario Macro cube CN elementar analyzer (Elementar Analysensysteme GmbH, Donaustraße 7, D-63452 Hanau-Germany). TOC content was determined according to the PN-ISO 14,235 by sulfochromic oxidation with titration of excess K₂Cr₂O₇ with FeSO₄(NH₄)₂SO₄·6H₂O.