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Are sandy soils infertile? -Revisiting soil fertility-

Research Project

Project/Area Number 23658060
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Plant nutrition/Soil science
Research InstitutionKyoto University

Principal Investigator

SHINJO Hitoshi  京都大学, 大学院・農学研究科, 助教 (70359826)

Project Period (FY) 2011 – 2012
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords砂質土壌 / 土壌肥沃度 / ニジェール / ナミビア / 半乾燥熱帯アフリカ
Research Abstract

To challenge our common sense that sandy soils are infertile, I have compared the sandy soils in Niger and Namibia and conducted the field trial in Niger. I found that the soils both in Niger and Namibia contain almost same amount of sands, while the ratio of clay to silt was higher in the soils in Namibia than those in Niger. In addition, clay minerals are also different between soils in Niger and Namibia, possibly reflecting the difference in soil formation processes. The field trial in Niger revealed that soils with more than 5% of silt and clay tended to form crust in soil surface. Soil crust retarded water infiltration into soil, which reduced the available water for plants. Finally, due to less available water in the soil, plant growth was seriously damaged.

Report

(3 results)
  • 2012 Annual Research Report   Final Research Report ( PDF )
  • 2011 Research-status Report
  • Research Products

    (16 results)

All 2013 2012 2011

All Journal Article (6 results) (of which Peer Reviewed: 6 results) Presentation (10 results)

  • [Journal Article] 西アフリカ・サヘル地域における草本植生劣化指標としての空間的ぱらつきの可能性2012

    • Author(s)
      伊ヶ崎健大,真常仁志,田中樹,岩井香泳子,小崎隆
    • Journal Title

      観光科学研究

      Volume: 5 Pages: 15-21

    • URL

      http://hdl.handle.net/10748/5048

    • Related Report
      2012 Annual Research Report 2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] 講座「サブサハラ・アフリカの土壌肥料研究最前線 1.講座のねらい、サブサハラ・アフリカの生態環境条件と農業の現状」2011

    • Author(s)
      真常仁志、荒木茂
    • Journal Title

      日本土壌肥料学雑誌

      Volume: 82 Pages: 330-337

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Aeolian materials sampler for measuring surface flux of soil nitrogen and carbon during wind erosion events in the Sahel, West Africa2011

    • Author(s)
      Ikazaki, K., Shinjo, H., Tanaka, U., Tobita, S., Funakawa, S., and Kosaki, T.
    • Journal Title

      Transactions of the ASABE

      Volume: 54 Pages: 983-990

    • Related Report
      2011 Research-status Report
    • Peer Reviewed
  • [Journal Article] Field-scale aeolian sediment transport in the Sahel, West Africa2011

    • Author(s)
      Ikazaki, K., Shinjo, H., Tanaka, U., Tobita, S., Funakawa, S., Kosaki, T.
    • Journal Title

      Soil Science Society of America Journal

      Volume: 75 Issue: 5 Pages: 1885-1897

    • DOI

      10.2136/sssaj2010.0416

    • Related Report
      2011 Research-status Report
    • Peer Reviewed
  • [Journal Article] Fallow Band System," a land management practice for controlling desertification and improving crop production in the Sahel, West Africa. 1.Effectiveness in desertification control and soil fertility improvement2011

    • Author(s)
      Ikazaki, K., Shinjo, H., Tanaka, U., Tobita, S., Funakawa, S., Kosaki, T.
    • Journal Title

      Soil Science and Plant Nutrition

      Volume: 57 Issue: 4 Pages: 573-586

    • DOI

      10.1080/00380768.2011.593155

    • NAID

      110009813735

    • Related Report
      2011 Research-status Report
    • Peer Reviewed
  • [Journal Article] 講座「サブサハラ・アフリカの土壌肥料研究最前線 1.講座のねらい、サブサハラ・アフリカの生態環境条件と農業の現状」2011

    • Author(s)
      真常仁志、荒木茂
    • Journal Title

      日本土壌肥料学雑誌

      Volume: 82 Pages: 330-337

    • Related Report
      2011 Research-status Report
    • Peer Reviewed
  • [Presentation] Practical technique and extension method for improvement of crop performance with wind erosion control2013

    • Author(s)
      Ueru Tanaka, K. Ikazaki, Y. Sasaki, H. Shinjo, S. Tobita
    • Organizer
      UNCCD 2nd Scientific Conference
    • Place of Presentation
      Bonn (Germany)
    • Related Report
      2012 Final Research Report
  • [Presentation] Practical technique and extension method for improvement of crop performance with wind erosion control2013

    • Author(s)
      Ueru Tanaka
    • Organizer
      UNCCD 2nd Scientific Conference
    • Place of Presentation
      ボン
    • Related Report
      2012 Annual Research Report
  • [Presentation] 西アフリカ・サヘル地域において地表面の状態が土壌水分動態に与える影響2012

    • Author(s)
      伊ヶ崎健大、真常仁志、田中 樹、石川裕彦、舟川晋也、小崎 隆
    • Organizer
      日本熱帯農業学会
    • Place of Presentation
      東京農工大学
    • Year and Date
      2012-03-31
    • Related Report
      2012 Final Research Report
  • [Presentation] Effects of wind erosion on water balance in a crop field in the Sahel, West Africa2012

    • Author(s)
      Kenta Ikazaki, Hitoshi Shinjo, Ueru Tanaka, Hirohiko Ishikawa, Shinya Funakawa, Takashi Kosaki.
    • Organizer
      Soil Science Society of America.
    • Place of Presentation
      Cincinnati (USA).
    • Related Report
      2012 Final Research Report
  • [Presentation] 西アフリカ・サヘル地域において地表面の状態が水収支および窒素の溶脱に与える影響2012

    • Author(s)
      伊ヶ崎健大、真常仁志、田中 樹、石川裕彦、舟川晋也、小崎 隆
    • Organizer
      日本土壌肥料学会2012年度大会
    • Place of Presentation
      鳥取大学
    • Related Report
      2012 Final Research Report
  • [Presentation] ザンビア東部州の疎開林における土壌特性値の空間的不均一性とその要因。2012

    • Author(s)
      真常仁志、野呂葉子、宮崎英寿、Sesele Sokotela。
    • Organizer
      日本土壌肥料学会2012年度大会
    • Place of Presentation
      鳥取大学
    • Related Report
      2012 Final Research Report
  • [Presentation] Effects of wind erosion on water balance in a crop field in the Sahel, West Africa2012

    • Author(s)
      Kenta IKAZAKI
    • Organizer
      Soil Science Society of America
    • Place of Presentation
      シンシナティ
    • Related Report
      2012 Annual Research Report
  • [Presentation] 西アフリカ・サヘル地域において地表面の状態が水収支および窒素の溶脱に与える影響2012

    • Author(s)
      伊ヶ崎健大
    • Organizer
      日本土壌肥料学会
    • Place of Presentation
      鳥取
    • Related Report
      2012 Annual Research Report
  • [Presentation] ザンビア東部州の疎開林における土壌特性値の空間的不均一性とその要因2012

    • Author(s)
      真常仁志
    • Organizer
      日本土壌肥料学会
    • Place of Presentation
      鳥取
    • Related Report
      2012 Annual Research Report
  • [Presentation] 西アフリカ・サヘル地域において地表面の状態が土壌水分動態に与える影響2012

    • Author(s)
      伊ヶ崎健大、真常仁志、田中 樹、石川裕彦、舟川晋也、小崎 隆
    • Organizer
      日本熱帯農業学会
    • Place of Presentation
      東京農工大学府中キャンパス
    • Related Report
      2011 Research-status Report

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Published: 2011-08-05   Modified: 2019-07-29  

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