Vol. 84 (2013)
No. 3 (pp. 153–266)
Original Papers
Analysis of river nitrogen concentration in the region around Lake Kasumigaura, Japan, by using a modified geographic information system model
Sunao ITAHASHI1, Michio KOMADA2 and Makoto TAKEUCHI3
1Natl. Inst. Agro-Environ. Sci., 2Natl. Agric. Res. Cent., 3Ex-Natl. Inst. Agro-Environ. Sci.
(Jpn. J. Soil Sci. Plant Nutr., 84, 153–165, 2013)
A modified geographic information system (GIS) model incorporating both the riparian function model (RFM) and the groundwater routing model (GRM) was used to study the effectiveness of riparian ecosystems to denitrify nitrogen (N) in groundwater. Literature values were used to develop the RFM and to determine relevant parameters, and the GRM was developed by analyzing regional geographical features to distinguish groundwater paths. The modified GIS model was evaluated by simulating N concentrations in nine rivers around Lake Kasumigaura, Japan, where groundwater is contaminated by N originating from agricultural activities and livestock. The N load distribution data for the model were precisely estimated for an agricultural unit to simulate river N concentrations during the non-irrigation season (October–March). The following results were obtained: (1) the strength of N reduction in the riparian area differed between locations depending on the toposequence and soil type, (2) groundwater seeped from the sides of deeper valleys around river mouths where the valleys had eroded below the impermeable layer—3.0 m below ground level—but no seepage was observed in shallower valleys in the middle and upper parts of streams, and (3) with reasonable parameters for the RFM and GRM, the modified GIS model adequately reproduced N concentrations in rivers (root-mean-square error = 0.85 mg N L─1). We conclude that the modified GIS model is suitable for simulating N concentrations in rivers in the region around Lake Kasumigaura.
Key words: GIS model, non-point N load, riparian zone, toposequence, water quality
Notes
Evaluation of silicate availability in siliceous materials by the modified extraction method using a new cation exchange resin
Kosei YAMASHITA1, Seiichi NIZUMA2 and Eiji FUJISAWA1
1JA ZEN-NOH Agrc. R&D Cent., 2JA ZEN-NOH
(Jpn. J. Soil Sci. Plant Nutr., 84, 166–170, 2013)
Effects of nursery soil and phosphate solution on efficacy of pre-transplanting phosphorus application method
Kae MIYAZAWA1,2 and Tohru MURAYAMA1
1Natl Agric. Res. Cent. For Tohoku Region, 2Present address: Institute for Sustainable Agro-Ecosystem Services, Univ. Tokyo
(Jpn. J. Soil Sci. Plant Nutr., 84, 171–174, 2013)
Effect of soil exchangeable bases on cesium uptake by sunflower (Helianthus annuus L.)
Shoji MATSUMURA1, Yudai ENDO1, Tomoko NINAGI2 and Itsuo GOTO2
1Tokyo Univ. Agric. Tech., Fac. Agric., 2Tokyo Univ. Agric., Fac. Applied Bio-Sci.
(Jpn. J. Soil Sci. Plant Nutr., 84, 175–178, 2013)
Current Topics
Anaerobic disinfestation using the bio-ethanol production from residue of citrus juice
Satoko YOKOTA1,2 and Takanori OOMORI1
1Ehime Res. Inst. Agric. Forest. Fish., 2Present address: Ehime Pref. Agric. Inst.
(Jpn. J. Soil Sci. Plant Nutr., 84, 179–181, 2013)
Method of radiocesium determination in soil and crops using a NaI (Tl) scintillation counter attached with an autosampler
Tatsuya NOBORI, Keitaro TANOI and Tomoko M. NAKANISHI
Grad. Schl. Agric. life Sci., Univ. Tokyo
(Jpn. J. Soil Sci. Plant Nutr., 84, 182–186, 2013)
Fluctuations in concentrations of Cl─ and Na+ in horticultural farmland soil in Miyagi prefecture, post-disaster of tsunami by the Tohoku earthquake
Hideyuki TAMATE1 and Keiichi KAMIYAMA1,2
1Miyagi Pref. Inst. Agric. Hort., 2Present Address: Miyagi Pref. Misato Agric. Extension Cent.
(Jpn. J. Soil Sci. Plant Nutr., 84, 187–189, 2013)
Lecture
Utilization and research of silicon in recent agriculture. 6. Alleviative effects of silicate application on the rice production by meteorological disaster
Shizuka MORI and Hiroshi FUJII
Fac. Agric., Yamagata Univ.
(Jpn. J. Soil Sci. Plant Nutr., 84, 190–195, 2013)
Utilization and research of silicon in recent agriculture. 7. Recommendations for future silicon research
Masahiko SAIGUSA
Toyohashi Univ. Tech., Res. Cent. Agrotechnology and Biotechnology
(Jpn. J. Soil Sci. Plant Nutr., 84, 196–201, 2013)
A new framework for study of irrigated paddy rice and upland crops rotation farming and its relation to soil and plant nutrition science. 1. Advances and perspectives in irrigated paddy rice and upland crops rotation farming
Tomoki TAKAHASHI1, Hirokazu SUMIDA2 and Rikiya NIRA3
1NARO Tohoku Agric. Res. Cent., 2Natl. Agric. Food Res. Org., 3NARO Agric. Res. Cent.
(Jpn. J. Soil Sci. Plant Nutr., 84, 202–207, 2013)
A new framework for study of irrigated paddy rice and upland crops rotation farming and its relation to soil and plant nutrition science. 2. Expectations of integrated manuring technology for productive soybean cultivation on drained paddy fields
Shinji SHIMADA
Natl. Agric. Res. Cent., Natl. Agric. Food Res. Org.
(Jpn. J. Soil Sci. Plant Nutr., 84, 208–214, 2013)
Miscellaneous
Effects of successive application of organic materials to paddy fields on rice yield and soil properties in Japan, based on the data base of long-term field experiments
Kenzo MIURA1 and Takashi KUSABA2
1Natl. Agric. Food Res. Org., Tohoku Agric. Res. Cent., 2Natl. Agric. Food Res. Org., Kyushu Okinawa Agric. Res. Cent.
(Jpn. J. Soil Sci. Plant Nutr., 84, 215–223, 2013)
Discussion for soil carbon stock in Japan from the viewpoint of the carbon quantity and quality
Masayuki KAWAHIGASHI1, Tadashi TAKAHASHI2, Kazumichi FUJII3, Masamichi TAKAHASHI3, Satoru MIURA3, Shigehiro ISHIZUKA4, Shinji KANEKO3, Yasuhito SHIRATO5, Yasumi YAGASAKI5, Yusuke TAKATA5, Rota WAGAI5, Ayaka KISHIMOTO5, Seiichiro YONEMURA5, Syuntaro HIRADATE5, Makiko WATANABE1, Takeki IZUMI1, Nobuhide FUJITAKE6 and Yasuo IIMURA7
1Grad. Schl. Urban Environ. Sci. Tokyo Metropolitan Univ., 2Grad. Schl. Agric. Sci., Fac. Agric. Tohoku Univ., 3Forestry and Forest Products Res. Inst., 4Forestry and Forest Products Res. Inst., Kyushu Res.Cent., 5Natl. Inst. Agro-Environ. Sci., 6Grad. Schl. Agric. Sci., Fac. Agric. Kobe Univ., 7River Basin Res. Cent., Gifu Univ.
(Jpn. J. Soil Sci. Plant Nutr., 84, 224–229, 2013)
Present status and future task of the study on soil classification in Japan
Kenzo MIURA1, Katsutoshi SAKURAI2, Akihiro IMAYA3, Toyoaki ITO4, Hiroshi OBARA5, Yusuke TAKATA5 and Yuji MAEJIMA5
1Natl. Agric. Food Res. Org., Tohoku Agric. Res. Cent., 2Kochi Univ., 3Forestry and Forest Products Res. Inst., 4Field Sci. Cent., Grad. Schl. Agric. Sci., Tohoku Univ., 5Natl. Inst. Agro-Environ. Sci.
(Jpn. J. Soil Sci. Plant Nutr., 84, 230–235, 2013)
Recent advances in research on the rice varietal differences in absorbing phosphorus from soil
Takeo KOYAMA
Japan Radioisotope Association
(Jpn. J. Soil Sci. Plant Nutr., 84, 236–237, 2013)
Report on the Workshops on Greenhouse Gas Emissions from Rice Production, Los Baños, the Philippines
Kazunori MINAMIKAWA and Kazuyuki YAGI
Natl. Inst. Agro-Environ. Sci.
(Jpn. J. Soil Sci. Plant Nutr., 84, 238, 2013)
On “Global Soil Partnership Training Workshop on the Update of Harmonized World Soil Database”
Shokichi WAKABAYASHI
Natl. Agric. Res. Cent.
(Jpn. J. Soil Sci. Plant Nutr., 84, 239, 2013)
Abstracts of Soil Science and Plant Nutrition, Vol. 59, No. 2 (2013)
(Jpn. J. Soil Sci. Plant Nutr., 84, 240–245, 2013)