Soil Bunds Effect on Soil Properties under Different Topographies of Southwest Ethiopia

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DOI: https://doi.org/10.30564/jees.v4i1.4322

Abstract:

Soil erosion is a major environmental problem affecting development endeavors. Physical soil and water conservation (SWC) measures such as soil bunds are implemented to mitigate soil erosion. However, information on the effects of soil bunds on soil fertility is limited. This study aimed to evaluate soil quality in fields with soil bunds and with no soil bunds in steep, middle and lower sloping cultivated lands as well as spatial variation of soil properties in between bunds in southwest Ethiopia. About 7-15 years old bunds and nearby cultivated fields lacking bunds were assessed. From 0 cm-20 cm soil depth, 36 soil samples were collected. Soil texture, soil organic carbon (SOC), total nitrogen (N_tot) and exchangeable potassium (K_exch) were analyzed. Soil bunds showed significantly (p<0.0.5) greater clay but less sand than adjacent no-bund fields. In steep, middle, and lower slopes, concentrations of SOC and K_exch were greater in fields with soil bunds than without. Lower slope fields showed greater clay, SOC and nutrients than steep slopes. In between soil bunds, soil was more fertile at bunds than below the bunds. In Fanta watershed, soil bunds are a vital conservation measure to retain soil fertility in cultivated mountainous areas.

References:

[1] Pimentel, D., Burgess, M., 2013. Soil erosion threatens food production. Agriculture. 3(3), 443-463. [2] Tully, K., Sullivan, C., Weil, R., et al., 2015. The state of soil degradation in Sub-Saharan Africa: Baselines, trajectories, and solutions. Sustainability. 7(6), 6523-6552. [3] Zingore, S., Mutegi, J., Agesa, B., et al., 2015. Soil degradation in sub-Saharan Africa and crop production options for soil rehabilitation. Better Crops. 99(1), 24-26. [4] Muchena, F.N., Onduru, D.D., Gachini, G.N., et al., 2005. Turning the tides of soil degradation in Africa: Capturing the reality and exploring opportunities. Land Use Policy. 22(1), 23-31. [5] Karamage, F., Zhang, C., Ndayisaba, F., et al., 2016. Extent of cropland and related soil erosion risk in Rwanda. Sustainability. 8(7), 609. [6] FAO, 2019. Proceedings of the global symposium on soil erosion 2019. Food and Agriculture Organization of United Nations: Rome. [7] Hurni, H., Abate, S., Bantider, A., et al., 2010. Land degradation and sustainable land management in the highlands of Ethiopia. Global Change and Sustainable Development. 5, 187-207. [8] Borrelli, P., Robinson, D.A., Fleischer, L.R., et al., 2017. An assessment of the global impact of 21st century land use change on soil erosion. Nature Communications. 8(1), 2013. [9] Hurni, H., 1983. Soil formation rates in Ethiopia. FAO/MOA Joint Project, EHRS, Working Paper No.2, Addis Ababa. [10] Bewket, W., Sterk, G., 2003. Assessment of soil erosion in cultivated fields using a survey methodology for rills in the Chemoga watershed, Ethiopia. Agriculture, Ecosystems & Environment. 97(1-3), 81-93. [11] Tefera, B., Sterk, G., 2010. Land management, erosion problems and soil and water conservation in Fincha' a watershed, western Ethiopia. Land Use Policy. 27(4), 1027-1037. [12] Adimassu, Z., Mekonnen, K., Yirga, C., et al., 2014. Effect of soil bunds on runoff, soil and nutrient losses, and crop yield in the central highlands of Ethiopia. Land Degradation & Development. 25(6), 554-564. [13] Wolka, K., Biazin, B., Martinsen, V., et al., 2020. Soil and water conservation management on hill slopes in southwest Ethiopia. I. Effects of soil bunds on surface runoff, erosion and loss of nutrients. Science of the Total Environment. 757, 142877. [14] Tenywa, M.M., Bekunda, M., 2009. Managing soils in Sub-Saharan Africa: Challenges and opportunities for soil and water conservation. Journal of Soil and Water Conservation. 64(1), 44A-48A. [15] Wolka, K., Mulder, J., Biazin, B., 2018. Effects of soil and water conservation techniques on crop yield, runoff and soil loss in Sub-Saharan Africa: A review. Agricultural Water Management. 207, 67-79. [16] Holden, S., Shiferaw, B., 2004. Land degradation, drought and food security in a less-favoured area in the Ethiopian highlands: A bio-economic model with market imperfections. Agricultural Economics. 30(1), 31-49. [17] Bewket, W., 2007. Soil and water conservation intervention with conventional technologies in northwestern highlands of Ethiopia: Acceptance and adoption by farmers. Land Use Policy. 24(2), 404-416. [18] Abera, W., Tamene, L., Tibebe, D., et al., 2019. Characterizing and evaluating the impacts of national land restoration initiatives on ecosystem services in Ethiopia. Land Degradation & Development. 31, 37-52. [19] Haregeweyn, N., Tsunekawa, A., Nyssen, J., et al., 2015. Soil erosion and conservation in Ethiopia. Progress in Physical Geography. 39(6), 750-774. [20] Porter, C., Goyal, R., 2016. Social protection for all ages? Impacts of Ethiopia's Productive Safety Net Program on child nutrition. Social Science & Medicine. 159, 92-99. [21] Adimassu, Z., Kessler, A., 2015. Impact of the productive safety net program on farmers' investments in sustainable land management in the Central Rift Valley of Ethiopia. Environmental Development. 16, 54-62. [22] Wolka, K., Biazin, B., Martinsen, V., et al., 2021. Soil and water conservation management on hill slopes in southwest Ethiopia. II. Modeling effects of soil bunds on surface runoff and maize yield using AquaCrop. Journal of Environmental Management. 296, 113187. [23] Desta, L., Carucci, V., Wendemagenehu, A., et al., 2005. Community based participatory watershed development: A guideline. Ministry of Agriculture and Rural Development: Addis Ababa, Ethiopia. [24] Amdemariam, T., Selassie, Y.G., Haile, M., et al., 2011. Effect of soil and water conservation measures on selected soil physical and chemical properties and barley (Hordeum spp.) yield. Journal of Environmental Science and Engineering. 5(11), 1483-1495. [25] Herweg, K., Ludi, E., 1999. The performance of selected soil and water conservation measures—case studies from Ethiopia and Eritrea. Catena. 36, 99-114. [26] Wolka, K., Moges, A., Yimer, F., 2011. Effects of level soil bunds and stone bunds on soil properties and its implications for crop production: The case of Bokole watershed, Dawuro zone, Southern Ethiopia. Agricultural Science. 2, 357-363. [27] Bezabih, B., Abebayehu, A., Tadesse, M., et al., 2016. The effect of land management practices on soil physical and chemical properties in Gojeb Sub-river Basin of Dedo District, Southwest Ethiopia. Journal of Soil Science and Environmental Management. 7(10), 154-165. [28] Mengistu, D., Bewket, W., Lal, R., 2015. Conservation effects on soil quality and climate change adaptability of Ethiopian watersheds. Land Degradation & Development. 27(6), 1603-1621. [29] Alemayehu, A.A., Getu, L.A., Addis, H.K., 2020. Impacts of stone bunds on selected soil properties and crop yield in Gumara-Maksegnit watershed Northern Ethiopia. Cogent Food & Agriculture. 6(1), 1785777. [30] Amare, T., Terefe, A., Selassie, Y.G., et al., 2013. Soil properties and crop yields along the terraces and toposequece of Anjeni Watershed, Central Highlands of Ethiopia. Journal of Agricultural Science. 5(2), 134. [31] Siriri, D., Tenywa, M.M., Raussen, T., et al., 2005. Crop and soil variability on terraces in the highlands of SW Uganda. Land Degradation & Development. 16(6), 569-579. [32] Wolancho, K.W., 2015. Evaluating watershed management activities of campaign work in Southern nations, nationalities and peoples' regional state of Ethiopia. Environmental Systems Research. 4, 1-13. [33] SNNPRS-BoFED, 2004. "Regional Atlas", Southern Nations, Nationalities and Peoples' Regional State, Bureau of Finance and Economic Development, Awassa, Ethiopia. [34] Bouyoucos, G.J., 1962. Hydrometer method improved for making particle size analysis of soil. Agronomy. 54, 464-465. [35] Walkley, A., Black, I.A., 1934. An examination of the degtjareff method for determining soil organic matter and a proposed modification of the chromic acid titration method. Soil Science. 37, 29-38. [36] Black, C.A., Evans, D.D., White, J.L., et al., 1965. Methods of soil analysis. Part 1. Physical and mineralogical properties, including statistics of measurement and sampling. American Society of Agronomy, Inc: Madison, Wisconsin. [37] Wang, L., Shi, Z.H., 2015. Size selectivity of eroded sediment associated with soil texture on steep slopes. Soil Science Society of America Journal. 79(3), 917. [38] Hishe, S., Lyimo, J., Bewket, W., 2017. Soil and water conservation effects on soil properties in the Middle Silluh Valley, northern Ethiopia. International Soil and Water Conservation Research. 5(3), 231-240. [39] Hailu, W., Moges, A., Yimer, F., 2012. The effects of "Fanya juu" soil conservation structure on selected soil physical & chemical properties: The case of Goromti watershed, Western Ethiopia. Resources Environment. 2, 132-140. [40] Chappell, A., Baldock, J., Sanderman, J., 2015. The global significance of omitting soil erosion from soil organic carbon cycling schemes. Nature Climate Change. 6(2), 187-191. [41] Olson, K.R., Al-Kaisi, M., Lal, R., et al., 2016. Impact of soil erosion on soil organic carbon stocks. Journal of Soil and Water Conservation. 71(3), 61-67. [42] Hassink, J., 1997. The capacity of soils to preserve organic C and N by their association with clay and silt particles. Plant and Soil. 191, 77-87. [43] Mupangwa, W., Twomlow, S., Walker, S., 2012. Dead level contours and infiltration pits for risk mitigation in smallholder cropping systems of southern Zimbabwe. Physics and Chemistry of the Earth, Parts A/B/C. 47-48, 166-172. [44] Saiz, G., Wandera, F.M., Pelster, D.E., et al., 2016. Long-term assessment of soil and water conservation measures (Fanya-juu terraces) on soil organic matter in South Eastern Kenya. Geoderma. 274, 1-9. [45] Van Oost, K., Govers, G., De Alba, S., et al., 2006. Tillage erosion: A review of controlling factors and implications for soil quality. Progress in Physical Geography. 30(4), 443-466. [46] Nyssen, J., Poesen, J., Gebremichael, D., et al., 2007. Interdisciplinary on-site evaluation of stone bunds to control soil erosion on cropland in Northern Ethiopia. Soil and Tillage Research. 94, 151-163. [47] Lin, C., Tu, S., Huang, J., et al., 2009. The effect of plant hedgerows on the spatial distribution of soil erosion and soil fertility on sloping farmland in the purple-soil area of China. Soil and Tillage Research. 105(2), 307-312. [48] Vancampenhout, K., Nyssen, J., Gebremichael, D., et al., 2006. Stone bunds for soil conservation in the northern Ethiopian highlands: Impacts on soil fertility and crop yield. Soil and Tillage Research. 90(1-2), 1-15. [49] Walle, R.J., Sims, B.G., 1999. Fertility gradients in naturally formed terraces on Honduran hillside farms. Agronomy Journal. 91, 350-353. [50] Koulouri, M., Giourga, C., 2007. Land abandonment and slope gradient as key factors of soil erosion in Mediterranean terraced lands. Catena. 69(3), 274-281. [51] Ziadat, F.M., Taimeh, A.Y., 2013. Effect of rainfall intensity, slope, land use and antecedent soil moisture on soil erosion in an arid environment. Land Degradation & Development. 24(6), 582-590.