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Soil Nutrient Contents in East African Climate-Smart Villages: Effects of Climate-Smart Agriculture Interventions

Author

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  • John Walker Recha

    (International Livestock Research Institute (ILRI), Nairobi P.O. Box 30709-00100, Kenya)

  • Gebermedihin Ambaw

    (International Livestock Research Institute (ILRI), Nairobi P.O. Box 30709-00100, Kenya)

  • Abebe Nigussie

    (Department of Natural Resources Management, Jimma University, Jimma P.O. Box 307, Ethiopia)

  • Maren Radeny

    (International Livestock Research Institute (ILRI), Nairobi P.O. Box 30709-00100, Kenya)

  • Dawit Solomon

    (International Livestock Research Institute (ILRI), Nairobi P.O. Box 30709-00100, Kenya)

Abstract

Short-term and plot-level trials mostly produce data on the advantages of climate-smart agriculture (CSA) practices on food security in a changing climate. Previous studies evaluated only one or a combination of a few CSA practices that improved soil nutrients, particularly in the landscapes of East Africa; hence, it is difficult to draw general conclusions. In this study, we evaluated the effect of CSA practices portfolio on soil macronutrient (nitrogen, phosphorus, and potassium) and micronutrient (manganese and zinc) levels in climate-smart villages (CSVs) in Uganda, Kenya, and Tanzania over a six-year period across different land uses such as agroforestry, cropland, grassland, forest, and control (without CSA practices). A total of 432 soil samples were collected at depths of 0–15, 15–45, and 45–100 cm, and analyzed for macro- and micronutrients. CSA practices increased total nitrogen (TN), phosphorus (P), and potassium (K) regardless of land use type or soil depth. TN, P, and K were mainly stored in surface soil (0–15 cm), accounting for 50.8–52.5%, 47.0–79.5%, and 34.2–65.5% respectively. Concentrations of Mn and Zn were 1.5–3.6 and 5.1–15.6 times greater under CSA than those under the control, respectively, at all soil depths. Results suggest that CSA practices implemented using the landscape approach contributed to improved soil fertility, which is critical in developing more sustainable and resilient production systems among smallholder farmers.

Suggested Citation

  • John Walker Recha & Gebermedihin Ambaw & Abebe Nigussie & Maren Radeny & Dawit Solomon, 2022. "Soil Nutrient Contents in East African Climate-Smart Villages: Effects of Climate-Smart Agriculture Interventions," Agriculture, MDPI, vol. 12(4), pages 1-14, March.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:4:p:499-:d:784651
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    References listed on IDEAS

    as
    1. Eric L. Bullock & Sean P. Healey & Zhiqiang Yang & Phoebe Oduor & Noel Gorelick & Steve Omondi & Edward Ouko & Warren B. Cohen, 2021. "Three Decades of Land Cover Change in East Africa," Land, MDPI, vol. 10(2), pages 1-15, February.
    2. Meron Tadesse & Belay Simane & Wuletawu Abera & Lulseged Tamene & Gebermedihin Ambaw & John W. Recha & Kindu Mekonnen & Getamesay Demeke & Abebe Nigussie & Dawit Solomon, 2021. "The Effect of Climate-Smart Agriculture on Soil Fertility, Crop Yield, and Soil Carbon in Southern Ethiopia," Sustainability, MDPI, vol. 13(8), pages 1-11, April.
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    Cited by:

    1. Maria Magdalena Turek Rahoveanu & Valentin Serban & Adrian Gheorghe Zugravu & Adrian Turek Rahoveanu & Dragoș Sebastian Cristea & Petronela Nechita & Cristian Silviu Simionescu, 2022. "Perspectives on Smart Villages from a Bibliometric Approach," Sustainability, MDPI, vol. 14(17), pages 1-17, August.

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