Papers - WATANABE, Akira
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Effect of sago palm (Metroxylon sagu Rottb.) plantation on CH4 and CO2 fluxes from a tropical peat soil. Reviewed
Watanabe, A., Kakuda, K., Purwanto, B.H., Jong, F.S., Ando, H.
Sago Palm Vol. 16 ( 1 ) page： 10-15 2008.10
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Spatial and seasonal variations in CH4 in groundwater used for agriculture in central Japan. Reviewed
Watanabe, A., Kasuya, M., Tsunekawa, A., Maeda, M., Sugimoto, A., and Kimura, M.
Agr. Ecosys. Environ. Vol. 127 ( 3/4 ) page： 207-214 2008.7
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Comparability of composition of carbon functional groups in humic acids between inverse-gated decoupling and cross polarization/magic angle spinning 13C nuclear magnetic resonance techniques. Reviewed
Watanabe, A. and Fujitake, N.
Anal. Chim. Acta Vol. 618 ( 1 ) page： 110-115 2008.5
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Composition of humic acids with respect to the degree of humification in cultivated soils with and without manure application as assessed by fractional precipitation. Reviewed
Kawasaki, S., Maie, N., and Watanabe, A.
Soil Sci. Plant Nutr. Vol. 54 ( 1 ) page： 57-61 2008.2
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Temporal changes in humic acids in cultivated soils with continuous manure application. Reviewed
Watanabe, A., Kawasaki, S., Kitamura, S., and Yoshida, S.
Soil Sci. Plant Nutr. Vol. 53 ( 5 ) page： 535–544 2007.12
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Ruthenium tertoxide oxidation analysis of soil fulvic acids. Reviewed
Ikeya, K., Imanishi, K., Katoh, C., and Watanabe, A.
Humic Sub. Res. Vol. 4 ( 1 ) page： 13-17 2007.12
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Effect of chemical fertilizer application on the growth and nutrient contents in leaflet of sago palm at the rosette stage. Reviewed
Ando, H., Hirabayashi, D., Kakuda, K., Watanabe, A., Jong, F.S., and Purwanto, B.H.
Jpn. J. Trop. Agr. Vol. 51 ( 4 ) page： 102-108 2007.12
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*Assessment of degradation and generation of humus in a coffee soil affected by weed cover by means of a stable carbon isotopic ratio. Reviewed
Watanabe, A., Takada, H., Sarno, Afandi, Adachi, T., Oki, Y., and Senge, M.
Eur. J. Soil Sci. Vol. 58 ( 5 ) page： 1042-1049 2007.10
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*Analysis of polynuclear aromatic and aliphatic components in soil humic acids using ruthenium tetroxide oxidation. Reviewed
Ikeya, K., Ishida, Y., Ohtani, H., Yamamoto, S., and Watanabe, A.
Eur. J. Soil Sci. Vol. 58 ( 5 ) page： 1050-1061 2007.10
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Monosaccharide composition of four humus fractions in an Andosol and a Cambisol. Reviewed
Itoh, K., Watanabe, A., Tsutsuki, K., and Kuwatsuka, S.
Soil Sci. Plant Nutr. Vol. 53 ( 1 ) page： 7-11 2007.2
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Temporal changes in distribution and composition of N from labeled fertilizer in soil organic matter fractions. Reviewed
Abe, T., Katayama, A., and Watanabe, A.
Biol. Fertil. Soils Vol. 43 ( 4 ) page： 427-435 2007.2
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Growth performance of sago palms (Metroxylon sagu Rottb.) in peat of different depth and soil water table. Reviewed
Jong, F.S., Watanabe, A., Hirabayashi, D., Matsuda, S., Purwanto, B.H., Kakuda, K., and Ando, H.
Sago Palm Vol. 14 ( 2 ) page： 59-64 2006.12
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*Chemical characteristics of dissolved organic nitrogen in an oligotrophic subtropical coastal ecosystem. Reviewed
Maie, N., Parish, K.J., Watanabe, A., Knicker, H., Benner, R., Abe, T., Kaiser, K., and Jaffé, R.
Geochim. Cosmochim. Acta Vol. 70 page： 4491-4506 2006.8
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Soil organic matter dynamics in lands continuously cultivated with maize and soybean in Heilongjiang Province, Northeast China: Estimation from natural 13C abundance Reviewed
Wang, G, Han, X., Nakayama, N., Watanabe, T., Watanabe, A., and Kimura, M.
Soil Sci. Plant Nutr. Vol. 52 ( 2 ) page： 139-144 2006.4
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Water solubility enhancement effects of some polychlorinated organic pollutants by dissolved organic carbon from a soil with a higher organic carbon content. Reviewed
Fukushima, M., Tanabe, Y., Yabuta, H., Tanaka F., Ichikawa, H., Tatsumi, K., and Watanabe, A.
J. Environ. Sci. Health, Part A Vol. 41 ( 8 ) page： 1483-1494 2006.4
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Structural stability and natural 13C abundance of humic acids in buried volcanic ash soils. Reviewed
Watanabe, A. and Takada, H.
Soil Sci. Plant Nutr. Vol. 52 ( 2 ) page： 145-153 2006.4
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Effect of off-line methylation using carbanion and methyl iodide on pyrolysis-gas chromatographic analysis of humic and fulvic acids. Reviewed
J. Anal. Appl. Pyrolysis
J. Anal. Appl. Pyrolysis Vol. 75 ( 2 ) page： 174-180 2006.2
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Heterocyclic N in the highly humified humic acids extracted from the subsoil of paddy fields and surface ando soils. Reviewed
Maie, N., Knicker, H., Watanabe, A., and Kimura, M.
Org. Geochem Vol. 37 ( 1 ) page： 12-19 2006.1
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Effects of fertilizer application on the root and aboveground biomass of sago palm (Metroxylon sagu Rottb.) cultivated in peat soil. Reviewed
Kakuda, K., Watanabe, A., Ando, H., and Jong, F.S.
Jpn. J. Trop. Agr. Vol. 49 ( 4 ) page： 264-269 2005.12
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Investigation of humic acid N with X-ray photoelectron spectroscopy: Effect of acid hydrolysis and comparison with 15N CPMAS NMR. Reviewed
Abe, T., Maie, N., and Watanabe, A.
Organic Geochemistry Vol. 36 ( 11 ) page： 1490-1497 2005.11