5 soil-solution ratio) (Jackson 1958), total inorganic carbonate with Scheibler calcimeter
(Allison and Moodie 1965), Electrical conductivity (EC) with conductivity probe (Jackson 1958) and organic matter by Wakley-Black wet oxidation method (Walkey and Black 1934).
Carbonate content was determined by the volumetric calcimeter
method (Loeppert and Suarez 1996).
The carbonate content of each soil was determined on duplicate samples using a volumetric calcimeter (Allison and Moodie 1965).
The calcium carbonate contents of the 18 soils, determined using a volumetric calcimeter, are shown in Table 2.
3] content was measured in a Bernard's calcimeter
by quantifying the C[O.
Where appropriate, samples were corrected for carbonate carbon determined by Collins Calcimeter
(Loveday and Reeve 1974).
p] horizon; both total and free carbonates were measured by the Bernard calcimeter
(Nijensohn and Pizarro 1960; Allison and Moodie 1965).
Total and active carbonates were measured with a Bernard calcimeter
and the cation exchange capacity (CEC) was assessed with both the NaOAc (pH 8.
The total organic C content was determined on a microprocessor-controlled induction furnace (LECO CR 12 carbon analyzer, manufactured by the LECO Corporation, USA) as described by Merry and Spouncer (1988) and corrected for carbonate-C determined by a volumetric calcimeter
method (Allison and Moodie 1965) where appropriate.
Corrections for carbonate C, determined by Collins calcimeter
(Loveday and Reeve 1974), were made where appropriate.
Inorganic C contents, measured using a calcimeter
, were only significant in the Two Wells B horizon samples, and were subtracted from the total C contents to obtain organic C contents.
Inorganic carbon (C), measured using a volumetric calcimeter
(Allison and Moodie 1965), was only detectable in Two Wells subsoil.