Are sandy soils infertile? -Revisiting soil fertility-
Project/Area Number |
23658060
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Research Category |
Grant-in-Aid for Challenging Exploratory Research
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Allocation Type | Multi-year Fund |
Research Field |
Plant nutrition/Soil science
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Research Institution | Kyoto University |
Principal Investigator |
SHINJO Hitoshi 京都大学, 大学院・農学研究科, 助教 (70359826)
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Project Period (FY) |
2011 – 2012
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Project Status |
Completed (Fiscal Year 2012)
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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)
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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.
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Report
(3 results)
Research Products
(16 results)
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[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.
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Journal Title
Transactions of the ASABE
Volume: 54
Pages: 983-990
Related Report
Peer Reviewed
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[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.
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Journal Title
Soil Science Society of America Journal
Volume: 75
Issue: 5
Pages: 1885-1897
DOI
Related Report
Peer Reviewed
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[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.
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Journal Title
Soil Science and Plant Nutrition
Volume: 57
Issue: 4
Pages: 573-586
DOI
NAID
Related Report
Peer Reviewed
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