1. The significance of KCl-extractable Al(III) as an index to lime requirement of soils of the humid tropics;Amedee;Soil Science,1976
2. Extraction of active aluminium from acid soils in Japan with different reagents;Arai;Genderma,1975
3. Significance of extractable aluminum in Hawaiian sugarcane soils;Ayres;Soil Science Society of America Proceedings,1965
4. Blakemore , L.C. Searle , P.L. Daly , B.K. 1981 Soil Bureau Laboratory Methods: A. Methods for Chemical Analyses of Soils Department of Scientific and Industrial Research, Lower Hutt, New Zealand