부산대학교 도서관

The ability to compare soil chemical data achieved by different chemical extraction methods is a necessity for an efficient longterm monitoring of soils and for comparisons of results from regional soil surveys with differing standard methods. This study compares two common methods for analysis of soil chemical properties, the combination of soil extraction in 1.0 M NH[sub 4]Cl and 1.0M KCl and the single extraction method using 0.1 M BaCl[sub 2]. Results show that the two methods do not differ in extraction capability with regard to pH and exchangeable calcium (Ca) and magnesium (Mg). However, there is less agreement in extraction capability with regard to potassium (K), sodium (Na), and aluminum (Al). For these elements, BaCl[sub 2] is less efficient than NH[sub 4]Cl and KCl. Despite the differences in extraction capability between BaCl[sub 2] and KCl/NH[sub 4]Cl, regression analyses showed that the methods are well correlated (high regression coefficients for all elements). Thus, transformation of data achieved by one method to estimated values of the other method are possible. Results from this study may be an important tool for comparisons of mineral soil data achieved by the two methods. [ABSTRACT FROM AUTHOR]