SEARCH
Search Details
Kashiwagi Jun'ichi
| Research Faculty of Agriculture Fundamental AgriScience Research Bioresource and Environmental Engineering | Lecturer |
Researcher basic information
■ Degree■ URL
researchmap URLホームページURL■ Various IDs
J-Global ID■ Research Keywords and Fields
Research KeywordResearch Field
- Environmental Science/Agriculture Science, Rural environmental engineering and planning
- Life Science, Plant nutrition and soil science
- Bachelor's degree program, School of Agriculture
- Master's degree program, Graduate School of Global Food Resources
- Doctoral (PhD) degree program, Graduate School of Global Food Resources
Research activity information
■ Papers- Inter-tillage Weeding in Organic Rice Farming
ZHOU Zhiduo; HAMAMOTO Shoichiro; ISHIGURO Munehide; KASHIWAGI Junichi
21, 27, 29, Mar. 2024, [Peer-reviewed]
English, Research institution - Characteristics and applicability of major approaches \\on spatial variability of soil properties in the field
HARAGUCHI Noburo; KASHIWAGI Junichi; SAITO Hirotaka
Journal of the Japanese Society of Soil Physics, 155, 155, 45, 66, Japanese Society of Soil Physics, Nov. 2023, [Peer-reviewed]
Japanese, Scientific journal, 本稿では,野外土壌の理化学性の空間的不均一性に対する主要なアプローチの特徴と適用性について論じた。均一系の水移動方程式を野外土壌に適用するためには,透水係数のスケールアップが必要である。Geostatisticsではkrigingを用いた透水係数のスケールアップはできないことを指摘した。代わる手法として,REV概念はサンプルスケールの増大によって透水係数をスケールアップする手法であるが,REVは労力をかけて実験的に求める必要があることを指摘した。確率論的水移動方程式は小スケールで得られた測定値から大スケールにおける透水係数を理論的に推定する手法であるが,透水係数の平均のサンプルスケール依存性は,この手法に疑問を投げかけることを指摘した。Time stabilityは時間的にも変動する土壌水分に対して,代表的な観測点の選定に有効であり,トレンド系にも適用できる特徴を指摘した。 - P1-1-12 Study of inter-tillage weeding in paddy field without agricultural chemicals and fertilizers(1-1 物質循環・動態 2023年度愛媛大会)
周 之舵; 濱本 昌一郎; 石黒 宗秀; 柏木 淳一
日本土壌肥料学会講演要旨集, 69, 9, 9, 一般社団法人 日本土壌肥料学会, 04 Sep. 2023
Japanese - Effect of Farmland Consolidation on Protein Content of Paddy Rice ― Evaluation by UAV with multispectral camera ―
KANEKO Taiki; KAKIMOTO Kengo; KASHIWAGI Junichi; TANI Hiroshi a; YAMAMOTO Tadao
Irrigation, Drainage and Rural Engineering Journal, 90, 1, I 149, I 159, 20 Apr. 2022, [Peer-reviewed]
Japanese, Scientific journal - Comparison of strontium retardation for kaolinite, illite, vermiculite and allophane
Zigong Ning; Munehide Ishiguro; Luuk K. Koopal; Tsutomu Sato; Jun’ichi Kashiwagi
Journal of Radioanalytical and Nuclear Chemistry, 317, 1, 409, 419, Springer Science and Business Media LLC, 21 Apr. 2018, [Peer-reviewed]
Scientific journal, Adsorption and retardation of Sr2+ by four clays were investigated, which were evaluated by using the distribution coefficient (K D ) and average penetration length ratio of Sr2+ to water (r). K D values for Sr2+ among the four clay minerals were in the order: kaolinite < illite < vermiculite ≪ allophane, and Sr2+ penetration length ratio (r) followed the inverse order. Adsorption was further analyzed by using Langmuir adsorption model for competitive Sr2+ and Na+ adsorption at constant NaCl concentration. Conditional affinity constants suggested that Sr2+ adsorption on the variable charge sites of clay edges contributed to the high conditional Sr2+ affinities. - Strontium adsorption and penetration in kaolinite at low Sr2+concentration
Ning, Zigong; Ishiguro, Munehide; Koopal, Luuk K; Sato, Tsutomu; Kashiwagi, Jun'ichi
Soil Science and Plant Nutrition, 63, 1, 14, 17, Taylor & Francis Asia Pacific (Singapore), 02 Feb. 2017, [Peer-reviewed]
English, Scientific journal, This is an Accepted Manuscript of an article published by Taylor & Francis in Soil Science and Plant Nutrition on 02 Feb 2017, available online: http://www.tandfonline.com/10.1080/00380768.2016.1277435.
ABSTRACT: Behavior of radioactive strontium (Sr2+) in contaminated soils is an important issue in relation to nuclear power plant accidents. The Sr2+adsorption on kaolinite and its migration in a kaolinite soil were investigated because toxic effects of radioactive Sr2+have been found to be very severe for living organisms at low Sr2+concentrations. Adsorption isotherms of Sr2+on kaolinite at different salt (NaCl) concentration and pH were obtained by the batch method. The calculated distribution coefficients (KD) ranged between 600 and 40,000 L kg−1, which showed a strong preference for the adsorbed phase. The results were used to evaluate the ratio (r) of penetration length of Sr2+relative to that of water in a model kaolinite soil. When the Sr2+solution was percolated constantly into the kaolinite soil, the penetration ofSr2+was delayed strongly at low Sr2+concentration due to adsorption. The Sr2+penetration length was only 0.001–0.056 of the water penetration length at pH 6.5 (0.1–10 mmol L−1NaCl). At pH 4.1 (1 mmol L−1NaCl) the effect was about 17 times less than at pH 6.5 (1 mmol L−1NaCl). Under all conditions, the Sr2+penetration increased when the Sr2+concentration increased due to the KD decrease. The Sr2+isothermscould be fitted well to the Langmuir adsorption equation, which indicates that only one site type is involved in the Sr2+adsorption. - Effects of puddling on percolation and rice yields in rainfed lowland paddy cultivation: Case study in Khammouane province, central Laos
Yoichi Fujihara; Ryuichi Yamada; Masato Oda; Hideto Fujii; Osamu Ito; Junichi Kashiwagi
Agricultural Sciences, 04, 08, 360, 368, Scientific Research Publishing, Inc., 2013, [Peer-reviewed]
Scientific journal - The Effect of Rain Fed Lowland Introduction on the Rice Yield in Northern Laos
KASHIWAGI Junichi; TANAHASHI Maiko; FUJIHARA Yoichi; ODA Masato
Water,Land and Environmental Engineering, 80, 5, 345, 348,a1, The Japanese Society of Irrigation Drainage and Rural Engineering, 2012, [Peer-reviewed]
Japanese, 休閑期間の短縮にともなって,陸稲収量の著しい低下が問題となっているラオス北部焼畑地域において,天水田の導入効果について検討した。天水田区の面積は212.5m2,集水面積は約4,000m2であった。天水田区の収量は,2.46Mg ha-1であり,耕地の大半を占める斜面区の収量の8倍であった。連作により,収量は前年の約65%に低下したが,天水田区と同様の地形条件にあり,均平と畦畔を造築していない脚部区と比べても高い収量を維持していた。天水田区は,斜面からの養水分の受け皿として機能しており,斜面区に比べて土壌養分・土壌水分の点で,脚部区と比べても土壌水分保持の点で陸稲生産に有利であった。また可給態リンを制限要因と仮定した場合,天水田区での連作は4年間可能であり,流域レベルでの生産性の安定化に貢献できることが示された。 - 道央に分布する粗粒火山灰土の構造と熱伝導特性
農業土木学会論文集, 2(3), 83-92, 2001 - 侵食機構と土壌微細構造に関する研究
三原 真智人; 成岡 市; 西村 拓; 柏木 淳一
農業土木学会誌 = Journal of the Agricultural Engineering Society, Japan, 63, 1, 102, 103, 01 Jan. 1995
Japanese - Estimating the amount of Soil losses using fallout radionuclide (137Cs)
Soil Physical Conditions and Plant Growth, Japan, 1995 - Temperature and Evaporation Measurement for Bare Soil Surface by Using a Thermal Imaging System
KASHIWAGI Jyunichi; SAKUMA Toshio
Japanese Journal of Soil Science and Plant Nutrition, 63, 71, 57, 62, Japanese Society of Soil Science and Plant Nutrition, 1992
Japanese - Basic Research of Intra Red Wave Color Pictures Analize.
63, 5, 610, 612, 1988 - 野外土壌の透水性の簡易測定
日本土壌肥料学雑誌, 73(6), 783-786 - 凍結・融解過程において凍土の熱伝導率が示すヒステリシスの発生機構
農業土木学会論文集, 218, 97-105
- Effects of biodegradable SAP & its size on interrill erodibility
辰野宇大; 中村遼; 柏木淳一; 濱本昌一郎, 土壌物理学会大会講演要旨集(Web), 2025, 2025 - 畑圃場の土壌管理における貫入抵抗値データの有効利用に関する研究
小林徹平; 柏木淳一; 濱本昌一郎; 辰野宇大; 山本忠男, 農業農村工学会誌, 93, 4, 2025 - 畑圃場の土壌管理における貫入抵抗値データの有効利用に関する研究
小林徹平; 柏木淳一; 濱本昌一郎; 辰野宇大; 山本忠男, 農業農村工学会北海道支部研究発表会講演集, 73rd, 2024 - Effects of living mulch on soil-water, heat, and gas behaviors in soybean fields
芳澤耀亮; 辰野宇大; 柏木淳一; 村島和基; 丸山隼人; 信濃卓郎; 二瓶直登; 市橋泰範; 濱本昌一郎, 農業農村工学会大会講演会講演要旨集(CD-ROM), 2024, 2024 - The effective use of penetration resistance data in soil management of upland fields
小林徹平; 柏木淳一; 濱本昌一郎; 辰野宇大; 山本忠男, 農業農村工学会大会講演会講演要旨集(CD-ROM), 2024, 2024 - 熱赤外線カラー映像解析の基礎的研究
昭和61〜62年度科学研究費補助金(一般研究B)研究成果報告書 畑地におけるエネルギーおよび物質循環の空間的変動に関する業態研究, 63, 5, 610, 612, 1988
- 傾斜畑における土壌水分の空間変動の解析
柏木淳一
農業土木学会講演要旨, 1997, 1997
1997 - 1997 - On the Local Denudation and Deposition of Surface Soil Materials in a Continuously Cultivated Fields in Hilly Area of Hokkaido
Trans. 14th Inter. Cong. Soil Sci., 1990
1990 - 1990
- 食資源環境論, 2024年, 修士課程, 国際食資源学院
- 食資源環境特論, 2024年, 修士課程, 国際食資源学院
- 大学院共通授業科目(一般科目):複合領域, 2024年, 修士課程, 大学院共通科目
- 食資源学総論, 2024年, 修士課程, 国際食資源学院
- 農業造構学, 2024年, 学士課程, 農学部
- 測量学実習, 2024年, 学士課程, 農学部
- 生物環境工学実験Ⅲ, 2024年, 学士課程, 農学部
- 農地環境工学, 2024年, 学士課程, 農学部
- 生物環境工学実習, 2024年, 学士課程, 農学部
■ Research Themes
- 土壌の空間変動性について
Competitive research funding - 土壌の不均一性に関する研究
Competitive research funding - 土壌構造と水移動に関する研究
Competitive research funding - 粗粒火山灰土の物理性に関する研究
Competitive research funding - Studies on Spatal Variability of Soil
Competitive research funding - Studies on Spatial Variability of Soil Properties
Competitive research funding - Studies on Soil Structural and Water Movement
Competitive research funding - Studies on Physical Properties of Coarse Volcanic Ash Soils
Competitive research funding
