Determination of Cation Exchange Capacity on Low to Highly Calcareous Soils

2005 ◽  
Vol 36 (11-12) ◽  
pp. 1479-1498 ◽  
Author(s):  
Qingren Wang ◽  
Yuncong Li ◽  
Waldemar Klassen
Keyword(s):  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
Calcareous Soils ◽  
Exchange Capacity

scholarly journals A Comparison of Methods for the Determination of Cation Exchange Capacity of Soils/Porównanie Metod Oznaczania Pojemności Wymiany Kationów I Sumy Kationów Wymiennych W Glebach

2014 ◽  
Vol 21 (3) ◽  
pp. 487-498 ◽  
Author(s):  
Dawid Jaremko ◽  
Dorota Kalembasa
Keyword(s):  
Organic Matter ◽  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
Sodium Acetate ◽  
Calcareous Soils ◽  
Acid Soils ◽  
Barium Chloride ◽  
Exchange Capacity ◽  
Organic Carbon Content

Abstract The object of this study was to compare the results obtained with four methods of determination of cation exchange capacity (CEC) and sum of exchangeable cations (Ca, Mg, K) in soils. One of these methods is Kappen’s method and the others methods are based on different extracting reagents: sodium acetate (pH = 8.2), barium chloride and hexaamminecobalt(III) chloride. Values measured with barium ions and hexaamminecobalt(III) ions as index cations are very comparable and these two methods can be considered as equivalent. Kappen’s method gives overestimated results, especially for acid soils reach in organic matter and very calcareous soils. Sodium acetate, buffering the pH of the extracting solution, causes increase of numbers of negatively charged sites and particularly those bonded to organic matter and for this reason values obtained with this method are overestimated. Nevertheless, it is possible to correct this error for a given soil sample by regression equation considering pH of soil, clay and organic carbon content.

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