Tied ridges climate smart technology and overall performance of orange flesh sweet potato varieties in semi-arid Kenya: Evidence from Samburu county
Paper Details
Tied ridges climate smart technology and overall performance of orange flesh sweet potato varieties in semi-arid Kenya: Evidence from Samburu county
Abstract
Sweet potato (Ipomoea batatas) is produced extensively throughout Africa and is rich in vitamins, dietary fiber, carotenoids, calcium, iron, potassium, protein, and carbs. Orange-fleshed sweet potato (OFSP) production in Kenya’s semi-arid regions faces chronic moisture stress, yet remains understudied. This study evaluated the effects of climate-resilient moisture conservation technologies-tied ridges, sunken beds, and flat beds (control)—on the growth and yield of three orange-fleshed sweet potato (OFSP) varieties (Irene, Ken Spot 4, and Ken Spot 5) in Samburu county’s semi-arid agroecological zones. A Randomized Complete Block Design (RCBD) with three replications was employed, with data collected on vine length, branch count, storage root yield (kg/plot), and dry matter content. Results revealed significant differences (*p* < 0.05) among treatments, with tied ridges producing the highest mean yield (5.27 ± 0.36 kg/plot), outperforming sunken beds (4.73 ± 0.32 kg/plot) and flat beds (3.60 ± 0.23 kg/plot). Among varieties, Irene demonstrated superior performance (5.58 kg/plot under tied ridges), while Ken Spot 5 exhibited notable drought adaptability. Regression analysis showed a strong positive relationship (R² = 0.72) between vine length and yield. The study concludes that tied ridges combined with high-yielding varieties significantly enhance OFSP productivity in water-limited environments. Recommendations include farmer training on tied ridge implementation, policy support for tool access, and further research on laborsaving innovations. These findings contribute to climate-smart agriculture strategies for food security in semi-arid regions.
Andrade MI, Naico A, Ricardo J, Eyzaguirre R, Makunde GS, Ortiz R, Grüneberg WJ. 2023. Breeding progress for vitamin A, iron and zinc biofortification, drought tolerance, and sweetpotato virus disease resistance in sweetpotato. Frontiers in Sustainable Food Systems 7, 1127712. https://doi.org/10.3389/fsufs.2023.1127712
Chepng’etich J, Mwangi M, Nyamongo D. 2023. Drought tolerance mechanisms in orange-fleshed sweetpotato varieties in East Africa. Journal of Arid Agriculture 12(3), 45–59. https://doi.org/10.1016/j.jaridenv.2023.104567
Cherotich VK, Saidi M, Ooro PA. 2021. Labor-saving technologies for smallholder farmers in Africa: A review of ox-drawn implements. Agricultural Mechanization in Asia, Africa and Latin America 52(3), 67–78.
Dumbuya G, Daramy MA, Rogers S. 2021. Soil water conservation techniques for improved sweetpotato production in Sierra Leone. African Journal of Agricultural Research 16(7), 987–995. https://doi.org/10.5897/AJAR2020.15321
Food and Agriculture Organization. 2022. The state of food security and nutrition in the world 2022. FAO. https://doi.org/10.4060/cc0639en
Food and Agriculture Organization. 2023. Climate-smart agriculture case studies 2023. FAO. https://www.fao.org/climate-smart-agriculture
Girard AW, Grant F, Watkinson M, Okuku HS, Wanjala R, Cole D, Levin C. 2022. Promoting orange-fleshed sweet potato: Evidence from a randomized control trial in Western Kenya. Maternal & Child Nutrition 18(1), e13269. https://doi.org/10.1111/mcn.13269
Kamau JW, Mwangi HW, Karanja SM. 2023. Digital tools for precision agriculture in Africa: Current applications and future prospects. Smart Agricultural Technology 4, 100186. https://doi.org/10.1016/j.atech.2023.100186
Kenya National Bureau of Statistics. 2022. Kenya demographic and health survey 2022. KNBS.
Kihara J, Bolo P, Kinyua M, Rurinda J, Piikki K. 2020. Soil health and ecosystem services in smallholder farming systems in East Africa. Agricultural Systems 180, 102772. https://doi.org/10.1016/j.agsy.2020.102772
Low JW, Thiele G, Namanda S. 2022. Sweetpotato for nutrition security in sub-Saharan Africa: Past progress and future prospects. Global Food Security 32, 100602. https://doi.org/10.1016/j.gfs.2021.100602
Maina FW, Muthoni JW, Kabira JN. 2023. Post-harvest quality of orange-fleshed sweetpotato as influenced by water conservation methods. African Journal of Horticultural Science 18(2), 34–47.
Munga TL, Mwakina EN. 2023. Adoption constraints of improved sweetpotato varieties among smallholder farmers in coastal Kenya. Journal of Agricultural Extension 27(1), 112–125. https://doi.org/10.4314/jae.v27i1.9
Mwangi PK, Njagi HW, Ntemuni LE. 2023. Soil fertility challenges in semi-arid sweetpotato production systems: Evidence from Samburu County, Kenya. Kenya Journal of Agricultural Science 15(2), 89–102.
Mwololo JK, Mutisya DL, Njeru PM. 2022. Water conservation technologies for drought-prone areas: Lessons from eastern Kenya. Agricultural Water Management 271, 107798. https://doi.org/10.1016/j.agwat.2022.107798
National Drought Management Authority. 2022. Samburu County drought early warning bulletin. NDMA Kenya.
Ndung’u CW, Gachene CK, Karanja NN. 2023. Tied ridges and organic amendments improve sweetpotato yield in semi-arid eastern Kenya. Experimental Agriculture 59(1), 1–15. https://doi.org/10.1017/S0014479722000321
Nyamai M, Mati BM, Home PG. 2021. Evaluation of water harvesting techniques for improved crop production in drylands of Kenya. Agricultural Water Management 245, 106539. https://doi.org/10.1016/j.agwat.2020.106539
Samburu County Government. 2023. Annual agricultural sector report. Department of Agriculture, Livestock and Fisheries. http://www.samburu.go.ke/documents/agriculture2023-report.pdf
Samburu Meteorological Department. 2024. Climate data report for Samburu County. Kenya Meteorological Department. http://www.meteo.go.ke/samburu-climate-data-2024.pdf
Lentaano Evelyne Ntemuni, Philip Mwangi, Hellen Njagi, 2025. Tied ridges climate smart technology and overall performance of orange flesh sweet potato varieties in semi-arid Kenya: Evidence from Samburu county. Int. J. Agron. Agric. Res., 27(2), 23-30.
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