Faculty Profiles - WATANABE, Akira

Papers - WATANABE, Akira

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Fulvic acids-like substances exuded from Shiitake mushroom beds－Amount, chemical characteristics, and antioxidant capacity. Reviewed

Watanabe, A., Shinomiya, A., Kashimura, K., Ikeya, K., Maie, N., and Kodama, H.

Bioresource Technology Reports Vol. 25 page： 101710 2024.2

Efficient nitrogen fertilization for sustainable sago palm (Metroxylon sagu Rottb.) cultivation in Tropical Peatland

Sasaki, Y; Ando, H; Kakuda, KI; Melling, L; Watanabe, A

PLANT PRODUCTION SCIENCE Vol. 28 ( 1 ) page： 23 - 33 2025.1

Revealing the influences of organic amendment-derived dissolved organic matter on growth and nutrient accumulation in lettuce seedlings (Lactuca sativa L.)

Sonsri, K; Phankamolsil, N; Kano-Nakata, M; Watanabe, A

OPEN AGRICULTURE Vol. 9 ( 1 ) 2024.12

Contribution of distinct components in divergent organic amendments to long-term accumulation of soil organic matter in agricultural soils: evidence from thermally assisted hydrolysis and methylation-GC/MS.

Sonsri K, Naruse H, Watanabe A

Environmental science and pollution research international Vol. 31 ( 49 ) page： 59190 - 59201 2024.10

Soil CO2 and CH4 fluxes from different forest types in tropical peat swamp forest (vol 858, 159973, 2023)

Busman, NA; Melling, L; Goh, KJ; Imran, Y; Sangok, FE; Watanabe, A

SCIENCE OF THE TOTAL ENVIRONMENT Vol. 912 page： 168867 2024.2

Fulvic acids-like substances exuded from shiitake mushroom beds-Amount, chemical characteristics, and antioxidant capacity

Watanabe, A; Shinomiya, A; Kashimura, K; Ikeya, K; Maie, N; Kodama, H

BIORESOURCE TECHNOLOGY REPORTS Vol. 25 2024.2

Stabilization mechanisms of organic matter in Andosols under long-term fertilization as revealed from structural, molecular, and stable isotopic signatures

Sonsri, K; Mitsuboshi, M; Watanabe, A

JOURNAL OF SOILS AND SEDIMENTS Vol. 24 ( 1 ) page： 47 - 59 2024.1

Impacts of agricultural drainage on the quantity and quality of tropical peat soil organic matter in different types of forests

Busman, NA; Maie, N; Sangok, FE; Melling, L; Watanabe, A

GEODERMA Vol. 439 2023.11

Insights into the formation and stability of soil aggregates in relation to the structural properties of dissolved organic matter from various organic amendments

Sonsri, K; Watanabe, A

SOIL & TILLAGE RESEARCH Vol. 232 2023.8

Soil CO2 and CH4 fluxes from different forest types in tropical peat swamp forest Reviewed International coauthorship International journal

Busman, NA; Melling, L; Goh, KJ; Imran, Y; Sangok, FE; Watanabe, A

SCIENCE OF THE TOTAL ENVIRONMENT Vol. 858 ( Pt 2 ) page： 159973 2023.2

Mechanisms controlling the stabilization of soil organic matter in agricultural soils as amended with contrasting organic amendments: Insights based on physical fractionation coupled with 13C NMR spectroscopy Reviewed

Sonsri, K; Naruse, H; Watanabe, A

SCIENCE OF THE TOTAL ENVIRONMENT Vol. 825 page： 153853 2022.6

Characterisation of Dissolved Organic Matter Fractions Released from Scottish Peatlands Invited Reviewed International coauthorship International journal

Watanabe, A; Katoh, M; McMaster, M; Anderson, HA

ANALYTICAL SCIENCES Vol. 37 ( 12 ) page： 1719 - 1725 2021.12

Improving effect of potassium in organic amendments on sodic soils Reviewed

Tong, LM; Fan, F; Watanabe, A

SOIL SCIENCE AND PLANT NUTRITION Vol. 67 ( 5 ) page： 527 - 534 2021.9

Chemical compositional analysis of soil fulvic acids using Fourier transform ion cyclotron resonance mass spectrometry Reviewed International coauthorship International journal

Ikeya, K; Sleighter, RL; Hatcher, PG; Watanabe, A

RAPID COMMUNICATIONS IN MASS SPECTROMETRY Vol. 34 ( 15 ) page： e8801 2020.8

Black carbon as a significant component of aromatic carbon in surface soils and its importance is enhanced in volcanic ash soil profiles Reviewed International journal

Lu Guan-Yang, Imai Hiroko, Ikeya Kosuke, Sumida Hiroaki, Watanabe Akira

ORGANIC GEOCHEMISTRY Vol. 140 page： 103957 2020.2

Variations in the rate of accumulation and chemical structure of soil organic matter in a coastal peatland in Sarawak, Malaysia Reviewed International coauthorship

Sangok, FE; Sugiura, Y; Maie, N; Melling, L; Nakamura, T; Ikeya, K; Watanabe, A

CATENA Vol. 184 page： 104244 2020.1

Invention of Artificial Rice Field Soil: A Tool to Study the Effect of Soil Components on the Activity and Community of Microorganisms Involved in Anaerobic Organic Matter Decomposition Reviewed

Maeda, Y; Mise, K; Iwasaki, W; Watanabe, A; Asakawa, S; Asiloglu, R; Murase, J

MICROBES AND ENVIRONMENTS Vol. 35 ( 4 ) page： 20093 2020

腐植物質の難分解性の鍵構造としての縮合芳香環構造 Invited Reviewed

渡邉　彰

Humic Substances Research Vol. 15 ( 1 ) page： 1 - 10 2019.3

Comparison of carbon skeletal structures in black humic acids from different soil origins

Ikeya Kosuke, Maie Nagamitsu, Han Xiaozeng, Wang Guanghua, Watanabe Akira

SOIL SCIENCE AND PLANT NUTRITION Vol. 65 ( 2 ) page： 109 - 113 2019.3

土壌腐植物質の定量・定性分析 Invited Reviewed

渡邉　彰

ぶんせき page： 490-491 2018.11

Characterization of dissolved organic matter in river water flowing through temperate and tropical peatlands based on size exclusion chromatography and fluorescence spectrometry Reviewed

Tsutsuki, K., Yoshida, E., Maie, N., Melling L., and Watanabe, A.

Humic Sub. Res. Vol. 14 page： 7-17 2018.6

Dynamics of humic and non-humic substances in the estuary of coastal wetlands Reviewed

Watanabe, A., Sugiura, Y., Maie, N., Melling, L., Sudid, D., and Tsutsuki, K.

Humic Sub. Res. Vol. 14 page： 19-32 2018.6

Influence of humic substances and iron and aluminum ions on the sorption of acetamiprid to an arable soil. Reviewed

Murano, H., Suzuki, K., Kayada, S., Saito, M., Yuge, N., Arishiro, T., Watanabe, A., and Isoi, T.

Sci. Total Environ. Vol. 615 page： 1478 - 1484 2018.2

土壌有機物の性状と蓄積 Invited

渡邉　彰

ペドロジスト Vol. 62 ( 2 ) page： 53 - 58 2018

Evaluation on the decomposability of tropical forest peat soils after conversion to an oil palm plantation

Sangok Faustina E., Maie Nagamitsu, Melling Lulie, Watanabe Akira

SCIENCE OF THE TOTAL ENVIRONMENT Vol. 587 page： 381 - 388 2017.6

熱帯アジア地域の問題土壌と農業生産 Invited Reviewed

小林優・小山博之・渡部敏裕・前島恵理子・Anongnat Sriprachote・落合久美子・清水顕史・近藤始彦・飯泉佳子・渡辺武・俵谷圭太郎・渡邉彰

日本土壌肥料学雑誌 Vol. 88 ( 3 ) page： 346 - 351 2017.6

Relationship between plant available silicon and reducible iron in irrigated paddy soils. Reviewed

Mihara, C., Chang, X., Sugiura, Y., Makabe-Sasaki, S., and Watanabe, A.

Soil Sci. Plant Nutr. Vol. 63 ( 1 ) page： 67-74 2017.2

Effect of applying cattle manure as a potassium-containing material for the reclamation of saline-sodic soils: A model experiment. Reviewed

Tong, L. and Watanabe, A.

Int. J. Plant Soil Sci. Vol. 13 ( 4 ) page： 1-12 2016.11

土壌有機物の化学構造と動態に関する研究

渡邉　彰

日本土壌肥料学雑誌 Vol. 87 ( 5 ) page： 313 - 316 2016.11

Size distribution of carbon layer planes in biochars from different plant type of feedstock with different heating temperatures. Reviewed

Lu, G-.Y., Ikeya, K., and Watanabe, A.

Chemosphere Vol. 163 page： 252-258 2016.8

Dynamics of dissolved silicon in rice paddies under conditions of water conservative irrigation. Reviewed

Mihara, C., Sasaki-Makabe, S., and Watanabe, A.

J. Soils Sediments Vol. 16 page： 547-556 2016.2

Stability of soil organic carbon accumulated under long-term use as rice paddy. Reviewed

Nakahara, S., Zou, P., Ando H., Fu, J., Cao, Z., Sugiura, Y., and Watanabe, A.

J. Geophys. Res.: Biogeosciences Vol. 121 ( 1 ) page： 67-77 2016.2

Application of 13C ramp CPMAS NMR with phase adjusted spinning sidebands (PASS) for quantitative estimation of carbon functional groups in natural organic matter. Reviewed

Ikeya, K. and Watanabe, A.

Anal. Bioanal. Chem. Vol. 408 ( 2 ) page： 651-655 2016.1

Changes in the composition of humic acids in various upland field soils with a continuous organic amendment as revealed by fractional precipitation analysis. Reviewed

Kawasaki, S., Ikeya, K., Sugiura, Y., and Watanabe, A.

Soil Sci. Plant Nutr. Vol. 61 ( 3 ) page： 450-460 2015.5

Characterization of composition of soil humic acids using Fourier transform ion cyclotron resonance mass spectrometry Reviewed

Ikeya, K., Sleighter, R.L., Hatcher, P.M., and Watanabe, A.

Geochimica Cosmochimica Acta Vol. 153 page： 169-182 2015.3

Five crop seasons' records of greenhouse gas fluxes from upland fields with repetitive applications of biochar and cattle manure. Reviewed

Watanabe, A., Ikeya, K., Kanazaki, Y., Makabe, S., Sugiura, Y., and Shibata, A.

J. Environ. Manage. Vol. 144 page： 168-175 2014.11

Composition of dissolved organic nitrogen in rivers associated with wetlands. Reviewed

Watanabe, A., Tsutsuki, K., Inoue, Y., Maie, N., Melling, L., and Jaffe, R.

Sci. Total Environ. Vol. 493 page： 220-228 2014.9

Dissolved organic matter dynamics in the oligo/meso-haline zone of wetland-influenced coastal rivers. Reviewed

Maie, N., Sekiguchi, S., Watanabe, A., Tsutsuki, K., Yamashita, Y., Melling, L., Cawley, K. M., Shima, E., and Jaffé, R.

J. Sea Res. Vol. 91 page： 58-69 2014.5

Dissolved black nitrogen (DBN) in freshwater environments. Reviewed

Ding, Y., Watanabe, A., and Jaffé, R.

Org. Geochem. Vol. 68 ( 1 ) page： 1-4 2014.3

長期水田利用下で蓄積した土壌有機炭素の安定性 International coauthorship

中原誌公・Zou P・安藤　豊・Fu J・Cao Z・渡邉　彰

名古屋大学加速器質量分析計業績報告書 Vol. 25 page： 62 - 68 2014.3

Fourier transform ion cyclotron resonance mass spectrometric analysis of green fraction of soil humic acids. Reviewed

Ikeya, K., Sleighter, R.L., Hatcher, P.M., and Watanabe, A.

Rap. Commun. Mass Sp. Vol. 27 ( 22 ) page： 2559-2568 2013.11

Production and characterization of humic-like substances from pyrolized plant materials by chemical oxidation. Reviewed

Sultana, N., Ikeya, K., Sugiura, Y., Lu, G. Y., Saito, K., and Watanabe, A.

Humic Sub. Res Vol. 10 ( 1 ) page： 11-19 2013.10

Fate of microelements applied to a tropical peat soil: column experiment. Reviewed

Miyamoto, E., Ando, H., Kakuda, K., Jong, F.S., and Watanabe, A.

Comm. Soil Sci. Plant Anal. Vol. 44 ( 17 ) page： 2524-2534 2013.9

Compositional features of Japanese Humic Substances Society standard soil humic and fulvic acids in Fourier transform ion cyclotron resonance mass spectrometry and X-ray diffraction profile analysis. Reviewed

Ikeya, K., Sleighter, R.L., Hatcher, P.M., and Watanabe, A.

Humic Sub. Res. Vol. 9 ( 1 ) page： 25-33 2012.10

Dissolved organic matter-complexed iron in two rivers with different types of soils in watershed area. Reviewed

Moroi, K., Isamoto, N., and Watanabe, A.

Int. J. Geosci. Vol. 3 ( 4 ) page： 710-718 2012.9

Dissolved organic matter in headwater streams: compositional variability across climatic regions. Reviewed

Jaffé, R., Yamashita, Y., Maie, N., Cooper, W. T., Dittmar, T., Dodds, W., Jones, J., Myoshi, T., Ortiz-Zayas, J. R., Podgorski, D. C., and Watanabe, A.

Geochim. Cosmochim. Acta Vol. 94 ( 1 ) page： 95-108 2012.5

土壌有機物の蓄積に対する燃焼生成物の寄与 Invited Reviewed International coauthorship

渡邉　彰・Minori Uchimiya・池谷康祐・進藤晴夫・平舘俊太郎

日本土壌肥料学雑誌 Vol. 83 ( 2 ) page： 222 - 227 2012.4

Contributions of humic substances to the dissolved organic carbon pool of wetlands: Assessment across a climatic gradient. Reviewed

Watanabe, A., Moroi, K., Sato, H., Tsutsuki, K., Maie, N., Melling, L., and Jaffe, R.

Chemosphere Vol. 88 ( 10 ) page： 1265-1268 2012.3

第２部門　土壌化学・土壌鉱物 Invited Reviewed

平舘俊太郎・松永俊朗・和田信一郎・渡邉　彰

日本土壌肥料学雑誌 Vol. 82 ( 6 ) page： 466 - 478 2011.12

Partial oxidation of char to enhance potential interaction with soil. Reviewed

Sultana, N., Ikeya, K., and Watanabe, A.

Soil Sci. Vol. 176 ( 9 ) page： 495-501 2011.9

Partial oxidation of char for enhancing potential interaction with soil Reviewed

Sultana, N., Ikeya, K., and Watanabe, A.

Soil Science Vol. 176 ( 9 ) page： 55-61 2011.9

Size distribution of condensed aromatic rings in various soil humic acids. Reviewed

Ikeya, K., Hikage, T., Arai, S., and Watanabe, A.

Organic Geochemistry Vol. 42 ( 1 ) page： 55-61 2011.1

Structural properties of plant charred materials in Andosols as revealed by X-ray diffraction profile analysis. Reviewed

Sultana, N., Ikeya, K., Shindo, H., Nishimura, S., and Watanabe, A.

Soil Sci. Plant Nutr. Vol. ５６ ( 6 ) page： 793-799 2010.12

年の腐植物質分析法の展開―6. 固体高分解能NMR法 Invited Reviewed

渡辺彰

日本土壌肥料学雑誌 Vol. 82 ( 4 ) page： 394-401 2010.8

Methane and CO2 fluxes from an Indonesian peatland used for sago palm (Metroxylon sagu Rottb.) cultivation: Effects of fertilizer and groundwater level management. Reviewed

Watanabe, A., Purwanto, B.H., Ando, H., Kakuda, K., and Shoon, J.F.

Agr. Ecosys. Environ. Vol. 134 ( 1/2 ) page： 14-18 2009.11

Complexation of Am with size-fractionated soil humic acids. Reviewed

Nagao, S., Aoyama, M., Watanabe, A., and Tanaka, T.

Colloids and Surfaces A: Physicochem. Eng. Aspects Vol. 347 ( 1-3 ) page： 239-244 2009.11

Effect of sago palm (Metroxylon sagu Rottb.) cultivation on the chemical properties of soil and water in tropical peat soil ecosystem. Reviewed

Miyamoto, E., Matsuda, S., Ando, H., Kakuda, K., Jong, F.S., and Watanabe, A.

Nutr. Cycl. Agroecosys. Vol. 85 ( 2 ) page： 157-167 2009.10

近年の腐植物質分析法の展開ーはじめに Reviewed

渡邉　彰

日本土壌肥料学雑誌 Vol. 81 ( 4 ) page： 417-418 2009.8

土壌―河川―海生態系における溶存有機炭素（DOC）の動態と機能

渡辺　彰・浅川大地・川東正幸・大手信人・長尾誠也・眞家永光・加藤英孝・竹中　眞

日本土壌肥料学雑誌 Vol. 80 ( 1 ) page： 79-85 2009.2

Effect of organic amendment on quantity and chemical characteristics of humic acids in various upland field soils. Reviewed

Watanabe, A., Kakuda, K., Purwanto, B.H., Jong, F.S., Ando, H.

Eur. J. Soil Sci. Vol. 59 ( 6 ) page： 1027-1037 2008.12

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

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

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

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

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

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

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

*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

*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

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

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

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

*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

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

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

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

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

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

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

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

インドネシア、テビンティンギ島におけるサゴヤシ栽培の持続性に関する研究 Reviewed

渡辺　彰・角田憲一・安藤　豊

Vol. 13 ( 1 ) page： 12-15 2005.8

ESR investigation of humic acids from a wide range of soils. Reviewed

Watanabe, A., McPhail, D., Maie, N., Anderson, H. A., and Cheshire, M. V.

Organic Geochemistry Vol. 36 ( 7 ) page： 981-990 2005.3

Kinetic parameters of gross N mineralization of peat soils as related to the composition of soil organic matter. Reviewed

Purwanto, B. H., Watanabe, A., Shoon, J. F., Kakuda, K., and Ando, H.

Soil Sci. Plant Nutr., Vol. 51 ( 1 ) page： 109-115 2005.2

Analysis of temperature effects on seasonal and interannual variation in CH₄ emission from rice-planted pots. Reviewed

Watanabe, A., Yamada, H., and Kimura, M.

Agr. Ecosys. Environ. Vol. 105 ( 1/2 ) page： 439-443 2005.1

Contribution of plant photosynthates to dissolved organic carbon in a flooded rice soil. Reviewed

Lu, Y., Watanabe, A., and Kimura, M.

Biogeochemistry Vol. 71 ( 1 ) page： 1-15 2004.12

Chemical characterization of Japanese Humic Substances Society standard soil humic and fulvic acids by spectroscopic and degradative analyses. Reviewed

Watanabe, A., Maie, N., Hepburn, A., McPhail, D., Abe, T., Ikeya, K., Ishida, Y., and Ohtani, H.

Humic Substances Research Vol. 1 ( 1 ) page： 18-28 2004.9

Semiquantitative GC/MS analysis of thermochemolysis products of soil humic acids with various degrees of humification. Reviewed

Ikeya, K., Yamamoto, S., and Watanabe, A.

Organic Geochemistry Vol. 35 ( 5 ) page： 583-594 2004.5

Chemical characteristics and potential source of fulvic acids leached from the plow layer soil of paddy soil. Reviewed

Maie, N., Watanabe, A., and Kimura, M.

Groderma Vol. 120 ( 3/4 ) page： 309-323 2004.5

Effect of weed management in coffee plantation on soil chemical properties Reviewed

Sarno, Lumbanraja, J., Afandi, Adachi, T., Oki, Y., Senge, M., and Watanabe, A.

Nutr. Cycl. Agroecosys. Vol. 69 ( 1 ) page： 1-4 2004.5

Soil chemical properties of an Indonesian red acid soil as affected by land use and crop management. Reviewed

Sarno, Iijima, M., Lumbanraja, J., Sunyoto, Yuliadi, E., Izumi, Y., and Watanabe, A.

Soil & Tillage Research Vol. 76 ( 2 ) page： 115-124 2004.2

*X-ray photoelectron spectroscopy of nitrogen functional groups in soil humic acids. Reviewed

Abe, T. and Watanabe, A.

Soil Science Vol. 169 ( 1 ) page： 35-43 2004.1

Flow of photosynthesized carbon from rice plants into the paddy soil ecosystem at different stages of rice growth. Reviewed

Watanabe, A., Machida, N., Takahashi, K., Kitamura, S., and Kimura, M.

Plant and Soil Vol. 258 ( 1 ) page： 151-160 2004.1

Method to quantify root border cells in sandy soil. Reviewed

Iijima, M., Higuchi, T., Watanabe, A., and Bengough, A.G.

Soil Biol. Biochem. Vol. 36 ( 9 ) page： 1517-1519 2004

Linking microbial community dynamics to rhizosphere carbon flow in a wetland rice soil. Reviewed

Lu, Y., Murase, J., Watanabe, A., Sugimoto, A., and Kimura, M.

FEMS Microbial. Ecol. Vol. 48 ( 2 ) page： 179–186 2004

Direct expression of an index for the degree of humification of humic acids using organic carbon concentration. Reviewed

Ikeya, K. and Watanabe, A.

Soil Sci. Plant Nutr. Vol. 49 ( 1 ) page： 47-53 2003.1

Carbon dynamics of rhizodeposits, root- and shoot-residues in a rice soil. Reviewed

Lu, Y., Watanabe, A., and Kimura, M.

Soil Biology and Biochemistry Vol. 35 ( 9 ) page： 1223-1230 2003

我が国の腐植物質研究とその展望. 2. 腐植物質の抽出および分画 Invited Reviewed

渡辺　彰

土肥誌 Vol. 73 ( 6 ) page： 797-802 2002.11

Incorporation of nitrogen from urea fertilizer into soil organic matter in rice paddy and cassava upland fields in Indonesia. Reviewed

Abe, T., Suwandhi, S. S., Ardjasa, W. S., Ando, H., and Watanabe, A.

Soil Sci. Plant Nutr. Vol. 48 ( 6 ) page： 825-832 2002.11

Input and distribution of photosynthesized carbon in a flooded rice soil. Reviewed

Lu, Y., Watanabe, A., and Kimura, M.

Global Biogeochem. Cycles Vol. 16 ( 4 ) page： no. 1085(7 pages) 2002.10

Contribution of plant-derived carbon to microbial biomass dynamics in a paddy rice microcosm. Reviewed

Lu, Y., Watanabe, A., and Kimura, M.

Biology and Fertility of Soils Vol. 36 ( 2 ) page： 136-142 2002.9

Changes in organic constituents of rice straw and succession of microbiota responsible for composting: Estimation by phospholipid fatty acid (PLFA) analysis. Reviewed

Cahyani, V. R., Watanabe, A., Matsuya, K., Asakawa, S., and Kimura, M.

Soil Sci. Plant Nutr. Vol. 48 ( 5 ) page： 735-743 2002.9

Nutrient availability and response of sago palm (Metroxylon sagu Rottb.) to controlled release N fertilizer on coastal lowland peat in the tropics. Reviewed

Purwanto, B. H., Kakuda, K., Ando, H., Jong, F.S., Yamamoto, Y., Watanabe, A., and Yoshida, T.

Soil Sci. Plant Nutr., Vol. 48 ( 4 ) page： 529-537 2002.8

Comparison of chemical characteristics of Type A humic acids extracted from subsoils of paddy fields and surface ando soils. Reviewed

Maie, N., Watanabe, A., Hayamizu, K., and Kimura, M.

Geoderma Vol. 106 ( 1/2 ) page： 1-19 2002.3

Fluorescence quenching studies of Eu-humic complexes by three-dimensional excitation emission matrix spectroscopy. Reviewed

Nagao S., Aoyama, M., Watanabe, A., Nakaguchi, Y., and Ogawa, H.

Anal. Sci. Vol. 17 page： 1585-1588 2001.12

Humus composition of soils under forest, coffee, and arable cultivaton in hilly areas of south Sumatra, Indoensia. Reviewed

Watanabe, A., Sarno, Rumbanraja, J., Tsutsuki, K., and Kimura, M.

European Journal of Soil Science Vol. 52 ( 4 ) page： 599-606 2001.10

Effects of shifting growth stage and regulating temperature on seasonal variation in CH₄ emission from rice. Reviewed

Watanabe, A., Yamada, H., and Kimura, M.

Global Biogeochemical Cycles Vol. 15 ( 3 ) page： 729-739 2001.7

Origin and properties of humus in the subsoil of irrigated rice paddies. IV. Effect of water percolation on the binding type of humus in a submerged plow layer soil. Reviewed

Maie, N., Watanabe, A., and Kimura, M.

Soil Sci. Plant Nutr. Vol. 47 ( 1 ) page： 1-8 2001.1

Effects of shifting growth stage and regulating temperature on seasonal variation in CH4 emission from rice. Reviewed

Watanabe, A., Yamada, H., and Kimura, M.

Global Biogeochem. Cycles Vol. 15 ( 3 ) page： 729-739 2001

Effect of planting density on methane emission from a rice paddy. Reviewed

Watanabe, A., Kajiwara, M., Yoshida, S., and Kimura, M.

Environ. Sci. Vol. 13 ( 2 ) page： 223-227 2000.4

Comparison of humus composition in the subsoil of Japanese paddy and upland fields. Reviewed

Maie, N., Watanabe, A., Taki, K., Yano, H., and Kimura, M.

Soil Sci. Plant nutr. Vol. 46 ( 1 ) page： 163-175 2000.3

Influence of chemical properties of soils on methane emission from rice paddies. Reviewed

Watanabe, A. and Kimura, M.

Comm. Soil Sci. Plant Anal. Vol. 30 ( 17/18 ) page： 2449-2463 1999.11

*Evaluation of origins of CH₄ carbon emitted from rice paddies. Reviewed

Watanabe, A., Takeda, T., and Kimura, M.

J. Geophys. Res. Vol. 104 page： 23,623-23,629 1999.1

Effect of rice straw application on CH₄ emission from paddy fields. IV. Influence of rice straw incorporated during the previous cropping period. Reviewed

Watanabe, A. and Kimura, M.

Soil Sci. Plant Nutr. Vol. 44 ( 4 ) page： 507-512 1998.12

Origin and properties of humus in the subsoil of irrigated rice paddies. III. Changes in biing type of humus in submerged plow layer soil. Reviewed

Maie, N., Watanabe, A. and Kimura, M.

Soil Science and Plant Nutrition Vol. 44 ( 3 ) page： 331-345 1998.9

Behaviors of organic matter and elements loaded into river water on reaching the estuary : A model experiment. Reviewed

Bulletin of the Society of Sea Water Science, Japan Vol. 52 ( 5 ) page： 306-314 1998.9

Factors affecting variation in CH₄ emission from paddy soils grown with different rice cultivars: A pot experiment. Reviewed

Watanabe, A. and Kimura, M.

Journal of Geophysical Research Vol. 103 ( D15 ) page： 18947-18952 1998.8

Origin and properties of humus in the subsoil of irrigated rice paddies. II. Effects of subsoil constituents and drainage on the accumulation of organic matter leached from the plow layer soil. Reviewed

Soil Sci. Plant Nutr. Vol. 44 ( 1 ) page： 77-91 1998.3

Contribution of rice straw carbon to CH₄ emission from rice paddies using ¹³C-enriched rice straw.

"Watanabe, A., Yoshida, M. and Kimura, M.,"

Journal of Geophysical Research Vol. 103 page： 8237-8242 1998.1

Origin and properties of humus in the subsoil of irrigated rice paddies. I. Leaching of organic matter from plow layer soil accumulation in subsoil. Reviewed

Maie, N., Watanabe, A. and Kimura, M.

Soil Science and Plant Nutrition Vol. 43 ( 4 ) page： 901-910 1997.12

Analysis of the green fraction of humic acids. Reviewed

"Watanabe, A., Fujimori, H., Nagai, Y., Miyajima, T. and Kuwatsuka, S.,"

European Journal of Soil Science Vol. 47 page： 197-204 1996.4

Influence of rice cultivar on methane emission from paddy fields. Reviewed

Watanabe, A., Kajiwara, M., Tashiro, T. and Kimura, M.

Plant and Soil Vol. 176 ( 1 ) page： 51-56 1995.10

Estimation of the increase in CH₄ emission from paddy soils by rice straw application. Reviewed

Watanabe, A., Satoh, Y. and Kimura, M.

Plant and Soil Vol. 173 page： 225-231 1995.7

Methane production and its fate in paddy fields, VIII. Seasonal variations in the amount of methane retained in soil. Reviewed

Watanabe, A. and Kimura, M.

Soil Science and Plant Nutrition Vol. 41 ( 2 ) page： 225-233 1995.6

Influences of application rate of rice sraw and rice cultivar on methane emission from paddy fields. Invited

Watanabe, A.

Jpan InfoMAB Vol. 17 page： 1-8 1995.2

Comparison of composition of humic and fulvic acids prepared by the IHSS method and NAGOYA method. Reviewed

Watanabe, A., Itoh, K., Arai, S., and Kuwatsuka, S.

Soil Sci. Plant Nutr. Vol. 40 ( 4 ) page： 601-608 1994.12

Effect of rice straw application on CH₄ emission from padely fields. III. Effect of incorporation site of rice straw on CH₄ emission rates and their variation among shoots of a rice plant Reviewed

Soil Sci. Plant Nutr. Vol. 40 ( 3 ) page： 497-504 1994.9

Methane production and its fate in paddy fields. V. Fate of methane remaining in paddy soil at harvesting stage. Reviewed

Soil Sci. Plant Nutr. Vol. 40 ( 2 ) page： 221-230 1994.6

土壌フルボ酸の化学的研究 Invited

日本土壌肥料学会雑誌 Vol. 65 ( 3 ) page： 253-254 1994.5

Methane emission from plots with differences in fertilizer application in Thai paddy fields. Reviewed

Soil Science and Plant Nutrition Vol. 40 ( 1 ) page： 63-71 1994.3

Methane in groundwater used for Japanese agriculture : Its relationship to other physico-chemical properties and possible tropospheric source strength Reviewed

Watanabe, A., Kimura, M., Kasuya, M., Kotake, M., and Katoh, T.

Geophysical Research Letters Vol. 21 ( 1 ) page： 41-44 1994.1

Changes of chemical properties and microbiological succession of lignites with weathering Reviewed

Bulletin of Japanese Society of Microbial Ecology Vol. 9 ( 2 ) page： 45-53 1994

Effect of rice strow application on CH₄ emission from paddy fields. I. Effect of weathering of rice straw in the field during off-crop season Reviewed

Soil Sci. Plant Nutr. Vol. 39 ( 4 ) page： 701-706 1993.12

Effect of rice straw application on CH₄ emission from paddy fields. II. Contribution of organic constituents in rice straw Reviewed

Soil Sci. Plant Nutr. Vol. 39 ( 4 ) page： 707-712 1993.12

Water-soluble organic materials in paddy soil ecosystem. I. Fractionation of water-soluble organic materials in leachate from submerged paddy soils using PVP and ion exchange resins Reviewed

Soil Sci. Plant Nutr. Vol. 39 ( 3 ) page： 529-538 1993.9

Properties of non-humic substances of fulvic acids fractionated by ethanol precipitation Reviewed

Watanabe, A. and Kuwatsuka, S.

Soil Sci. Plant Nutr. Vol. 39 ( 1 ) page： 71-78 1993.3

Methane production and its fate in paddy fields. II. Oxidation of methane and its coupled ferric oxide reduction in subsoil Reviewed

Soil Sci. Plant Nutr. Vol. 38 ( 4 ) page： 673-679 1992.12

Suppression of methane fluxes from flooded paddy soil with rice plants by foliar spray of nitrogen fertilizers. Reviewed

Kimura, M., Asai, K., Murase, J., Watanabe, A., and Kuwatsuka, S.

Soil Sci. Plant Nutr. Vol. 38 ( 4 ) page： 735-740 1992.12

Methane production and its fate in paddy fields. I. Effect of rice straw application and percolation rate on the leaching of methane and other soil components into the subsoil Reviewed

Soil Sci. Plant Nutr. Vol. 38 ( 4 ) page： 665-672 1992.12

Ethanol-soluble and insoluble fractions of humic substances in soil fulvic acids Reviewed

Watanabe, A. and Kuwatsuka, S.

Soil Sci. Plant Nutr. Vol. 38 ( 3 ) page： 391-399 1992.9

Ethanol-soluble and insoluble fractions of non-humic substances in soil fulvic acids Reviewed

Watanabe, A. and Kuwatsuka, S.

Soil Sci. Plant Nutr. Vol. 38 ( 3 ) page： 401-409 1992.9

Methane emission from paddy field (Part 2) Main route of methane transfer through rice plant, and temperature and light effects on diurnal variation of methane emission. Reviewed

Miura, Y., Watanabe, A., Kimura, M., and Kuwatsuka, S.

Environ. Sci. Vol. 5 ( 3 ) page： 187-193 1992.7

Chemical characteristics of soil fulvic acids fractionated using polyvinylpyrrolidone (PVP). Reviewed

Watanabe, A. and Kuwatsuka, S.

Soil Sci. Plant Nutr. Vol. 38 ( 1 ) page： 31-41 1992.1

Comparison of two methods of preparation of humic and fulvic acids, IHSS method and NAGOYA method. Reviewed

Kuwatsuka, S., Watanabe, A., Itoh, K., and Arai, S.

Soil Sci. Plant Nutr. Vol. 38 ( 1 ) page： 23-30 1992.1

Methane emission from paddy field (Part 1) Effect of fertilization, growth stage and midsummer drainage : Pot experiment. Reviewed

Kimura, M., Miura, Y., Watanabe, A., Katoh, T., and Haraguchi, H.

Environ. Sci. Vol. 4 ( 4 ) page： 265-271 1991.10

Fractionation of soil fulvic acids using polyvinylpyrrolidone and their ionization difference spectra. Reviewed

Watanabe, A. and Kuwatsuka, S.

Soil Sci. Plant Nutr. Vol. 37 ( 4 ) page： 611-617 1991.10

Triangular diagram for humus composition in various types of soils. Reviewed

Watanabe, A. and Kuwatsuka, S.

Soil Sci. Plant Nutr. Vol. 37 ( 1 ) page： 167-170 1991.1

¹³C-NMR investigation of humic and fulvic acids obtained from some typical Japanese soils. Reviewed

Watanabe, A., Tsutsuki, K., and Kuwatsuka, S.

Sci. Total Environ. Vol. 91/92 page： 195-200 1989

The change in chemical properties of the humus in the buried peat soil with age.

Vol. 4 page： 65-80 1988

Pedochemical studies on Ohnobara peat with special reference to its properties related to ando soils Reviewed

Vol. 32 ( 1 ) page： 16-25 1988

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