@ARTICLE {JUO:1979, title = {Copper chloride as an extractant for estimating the potentially reactive aluminum pool in acid soils}, author = {Juo, A. S. R. and Kamprath, E. J. }, journal = {Soil Science Society of America Journal}, year = {1979}, volume = {43}, number = {1}, pages = {35--38}, issn = {0361-5995}, note = {Reprint Series}, doi = {10.2136/sssaj1979.03615995004300010006x}, }