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Humus composition of Amazonian Dark Earths in the Middle Amazon, Brazil |
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| Authors: | Satoshi NAKAMURA Mario HIRAOKA Eiji MATSUMOTO Kenji TAMURA Teruo HIGASHI |
| Affiliation: | Graduate School of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572,;Faculty of Economics, Dokkyo University, Saitama 340-0042, Japan;and;Department of Geography, Millersville University, Millersville, Pennsylvania 17551, USA |
| Abstract: | |
| Keywords: | Amazonian Dark Earths humic acid humus accumulation humus complex humus composition |