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Characterisation and Mapping of Soils in Major Coffee Growing Regions of Uganda

Author

Listed:
  • Gerald Kyalo
  • Peter Charles Apunyo
  • Majaliwa Mwanjalolo
  • Charles Kizza Luswata
  • Ronald Kawooya
  • Emmanuel Iyamulemye Niyibigira

Abstract

There is limited information on the soil nutrient status, site specific fertilizer and agronomic recommendations for coffee in Uganda hence limiting its production and productivity. Therefore, this study was undertaken to characterize the soils under coffee farms and provide fertilizer and land management recommendations for coffee farming in selected districts in Uganda. 717 soil samples were collected from 45 coffee growing districts that were purposively selected to represent the major coffee growing regions of Eastern, Northern, Western, Mid-west and West Nile. 35 districts were sampled from Robusta coffee growing areas and 10 districts from Arabica coffee growing areas. Parameters considered in the laboratory analysis included; pH, total organic carbon, total nitrogen, available P, exchangeable Calcium (Ca), Sodium (Na), Magnesium (Mg), and Potassium (K) and micro elements- Iron (Fe), Zinc (Zn), Copper (Cu), Manganese (Mn) and Boron, soil texture, bulk density and hydraulic conductivity. Soil nutrient levels distribution maps for Robusta and Arabica coffee growing regions were generated in ArcGIS for the entire country. The soil chemical and physical properties were subjected to analysis of variance using Genstat 14th edition. The soil mapping results showed that, the overall average soil macro-nutrients concentrations were significantly different across regions (p < 0.05) with Eastern having the highest levels of macro elements (CEC of 19.28 meq/100 g, Base Saturation (BS) of 43.40%, pH of 5.78, N of 0.20%, K of 1.64 meq/100 g, P of 107.68 mg/kg and OM of 3.31%) followed by Western region. No significant difference (p > 0.05) was recorded for the micronutrients across the different regions, except Zn (p < 0.05). This study showed that Phosphorus and Potassium were generally moderate to high levels in most of the regions sampled while Nitrogen and organic matter were moderate to low. Results from this study provide a general picture of the nutrient status across all coffee growing regions in Uganda and highlight the required modifications for increased production and productivity.

Suggested Citation

  • Gerald Kyalo & Peter Charles Apunyo & Majaliwa Mwanjalolo & Charles Kizza Luswata & Ronald Kawooya & Emmanuel Iyamulemye Niyibigira, 2024. "Characterisation and Mapping of Soils in Major Coffee Growing Regions of Uganda," Journal of Agricultural Science, Canadian Center of Science and Education, vol. 16(1), pages 1-49, January.
    • Handle: RePEc:ibn:jasjnl:v:16:y:2024:i:1:p:49
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    References listed on IDEAS

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    1. Pender, John & Jagger, Pamela & Nkonya, Ephraim & Sserunkuuma, Dick, 2004. "Development Pathways and Land Management in Uganda," World Development, Elsevier, vol. 32(5), pages 767-792, May.
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    JEL classification:

    • R00 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General - - - General
    • Z0 - Other Special Topics - - General

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