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Item Seasonal variability in food and nutrition security among children 0-3 years in Karamoja sub-region of Uganda(African Journal of Food, Agriculture, Nutrition and Development, 2022-09-09) Muggaga, C; Ongeng, D; Mugonola, B; Okello-Uma, I; Kaaya, N.A.; Taylor, DOptimal nutrition and good feeding of infants and young children are among the most important determinants of their health, growth and development. Due to unimodal climate in Karamoja sub-region, north eastern Uganda, achieving food security remains a development challenge in the area impacting negatively on the nutrition and health status of infants and young children. The current study, therefore, is important in providing the basis for season-based interventions to improve food and nutrition security in Karamoja sub-region. A longitudinal study involving 267 lactating mothers during harvesting season and 380 during planting season was conducted. Data were collected using Individual level Dietary Diversity questionnaire, 24-Hour Dietary Recall, and Anthropometry and were analyzed statistically. The findings indicated that except Abim district, 77.8-97.8%of the lactating mothers never attended school; 75- 100% depend on subsistence farming. Lactating mothers (29.9-41.9%) introduced complementary foods to their infants at 6 months, while the age at first introduction of any food to the infant was mostly between 4-6 months. Dietary quality of complementary foods was low across all the districts; 6.7-38.9% of the children ate foods from four or more of the seven food groups in the previous day (Minimum Dietary Diversity) in both seasons. Complementary foods were characterized by plant food sources. With exception of milk and milk products, proportion of children who consumed animal-sourced foods was low, ranging from 0% in meats to 8.9% in fish and sea foods. Energy and nutrient intakes varied according to age groups of the children across districts and season. The proportion of children below -2 Z-score also varied according to districts and it is generally higher during the planting season than the harvesting season. The median of the z-scores for height-for age and Mid Upper Arm Circumference for age ranged from -1 to -2.5. In conclusion, there were variations and disparities in dietary diversity, energy and nutrient intake as well as nutrition status of infants and young children across season and districts in Karamoja sub-region of Uganda. Therefore, interventions to combat malnutrition among children 0-3 years need to take into account seasonal variations for each of the geographical locations in Karamoja sub-region.Item Temporal Dynamics of Napier Grass Stunt Disease as Influenced by Napier Grass Clones and Initial Inoculum(merican Journal of Experimental Agriculture, 2015-05-09) Kawube, Geofrey; Talwana, Herbert; Alicai, Titus; Otim, Michael; Mukwaya, Anthony; Kabirizi, JollyNapier grass stunt disease (NGSD) is the main biotic factor limiting Napier grass production in the East African region. Its management is, however, hampered by inadequate epidemiological information. This study determined the temporal spread of NGSD in Napier grass fields. A field experiment was setup at National Crops Resources Research Institute, Namulonge in Uganda to determine the influence of initial inoculum and clones on the spread of NSD in the field. The experiment was arranged in a randomized Complete Block Design and replicated 4 times. The initial inoculum levels used were 0%, 10%, 20% and 30% while the clones included KW4, local/wild type and P99, respectively. Napier grass stunt disease incidence data was recorded at 60 days intervals starting 90 days after planting up to 450 days. Napier grass was cut back to a height of 5 cm above ground after each data collection. Gompertz model was found to adequately describe NGSD temporal spread, the basis on which all incidence data was transformed. Results indicate that NGSD symptoms appeared in the field after 150 days after planting. However, NGSD incidence at the time was influenced by initial inoculum levels and type of clone. Plots with higher levels of initial inoculum density reached epidemic levels faster than those without. Disease incidence increased with increase in levels of initial inoculum and time, doubling after every 13.8 to 29.8 days, as such the rate of disease spread is moderate. The disease progression was fastest in clone P99 followed by KW4 and least in local. Final NGSD incidence and Area Under Disease Progress Curve (AUDPC) were linearly related with the NGSD incidence at the time the disease was first detected; indicating that incidence at NSD detection can be used to predict the final disease and AUDPC in the field. Therefore, deployment of measures that reduce initial inoculum is important in control of the disease.Item Stakeholders’ Perceptions of Agronomic Iodine Biofortification: A SWOT-AHP Analysis in Northern Uganda(MDPI journal of Nutrients, 2018-03-24) Olum, S.; Gellynck, X.; Okello, C.; Webale, D.; Odongo, W.Agronomic biofortification (i.e., the application of fertilizer to elevate micronutrient concentrations in staple crops) is a recent strategy recommended for controlling Iodine Deficiency Disorders (IDDs). However, its success inevitably depends on stakeholders’ appreciation and acceptance of it. By taking Northern Uganda as a case, this study aimed to capture and compare the perceptions of seven key stakeholder groups with respect to agronomic iodine biofortification. Therefore, we employed a SWOT (Strength, Weaknesses, Opportunities & Threats) analysis in combination with an Analytical Hierarchy Process (AHP). Findings show that stakeholders (n = 56) are generally positive about agronomic iodine biofortification in Uganda, as its strengths and opportunities outweighed weaknesses and threats. Cultural acceptance and effectiveness are considered the most important strengths while the high IDD prevalence rate and the availability of iodine deficient soils are key opportunities for further developing agronomic iodine biofortification. Environmental concerns about synthetic fertilizers as well as the time needed to supply iodine were consideredcrucialweaknesses. ThelimiteduseoffertilizerinUgandawasthemainthreat. Whilethis study provides insight into important issues and priorities for iodine biofortification technology in Uganda, including differences in stakeholder views, the application of the SWOT-AHP method will guide future researchers and health planners conducting stakeholder analysis in similar domains.Item Optimization of roughing filtration unit for a handwashing wastewater recirculation point-of-use system(IWA PUBLISHING COMAPANY, 2022-11-22) Olupot, Peter Wilberforce; Menya, Emmanuel; Jjagwe, Joseph; Wakatuntu, Joel; Román, Franz; Hensel, OliverA downward roughing filter unit consisting of silica sand as the filter medium was optimized for performance towards removal of turbidity and suspended solids from handwashing wastewater. Design-Expert software was employed to optimize media particle size, filter depth, and flow rate. Linear and quadratic models were found to best fit the responses of turbidity and suspended solids removal, respectively. Particle size and flow rate were the only parameters with significant effects on the removal of turbidity and suspended solids. Optimal conditions were found to be media particle size 0.6 mm, filter depth 12 cm, and flow rate 0.3 Lmin 1 , corresponding to removal efficiencies of 62 and 67% for turbidity and total suspended solids (TSS), respectively, as predicted by the model. Validation of the model at optimal conditions resulted in turbidity and TSS removal of 55 and 53%, respectively. Additionally, removal efficiencies of the roughing filter towards apparent colour, true colour, biochemical oxygen demand (BOD5), and chemical oxygen demand (COD) from handwashing wastewater were 56, 20,32, and 5%,respectively. Overall, although the turbidity of filtered water was .50 NTU, the reduction achieved by roughing filtration is a significant step in enhancing the performance of water treatment processes downstream, including filtration and adsorption by slow sand filters and activated carbon, respectively.Item Experimental evaluation of rice husk ash for applications in geopolymer mortars(Keai publishing, 2021-02-26) Ogwanga, G.; Olupot, P.W.; Kasedde, H.; Menya, E.; Storz, H.; Kiros, Y.Rice husks obtained from upland and lowland rice varieties were characterized by the composition and content of ash. Each of the rice husk varieties was fired at temperatures of 600, 800, and 900 °C for a soaking period of 3 h. The resultant rice husk ash was analyzed for oxide composition and crystallinity using X-ray fluorescence and diffraction techniques, respectively. The generated amorphous ash with the highest silica content, together with metakaolin, aggregate, water, and an alkaline activator was employed to formulate geo-polymer mortar prisms according to the standard EN 196–1. Results showed that the content of ash in the varieties ranged from 18.3% to 28.6% dry basis. Out of this, 89 wt%–96 wt% was silica, with amorphous and crystalline forms of silica obtained at 600 °C and 900 °C, respectively, regardless of the rice variety. However, at 800 °C, the silica in the generated ash exhibited both amorphous and crystalline forms. The amorphous ash generated at 600 °C was used in the formulation of geopolymer mortars. The compressive and flexural strength of the formulated mortar after 7 days of curing was 1.5 and 1.3 MPa, respectively. These results reveal the firing protocol to form pozzolanic ash, with potential applications in mortar production.Item Responsiveness of agricultural training curricula in African universities to labour market needs: the case of Gulu University in Uganda(African Journal of Rural Development, 2016-11-10) Odongo, W; Kalule, S.W; Ndyomugyenyi, E.K; Omara, P.; & Ongeng, D.Agricultural universities in Africa have a core responsibility to develop and implement relevant curricula to produce well trained human resource to guide stakeholders in production, value addition and marketing to meet the expected quantity and quality requirements of modern agri-food supply chain systems. This paper presents innovations in agricultural training curricula at Gulu University in Uganda designed to produce the breed of graduates, blending in character, the attitudes, hands-on practical skills and knowledge to exploit and succeed in the commonly perceived “non- attractive” labour market of the agricultural sector in Sub-Saharan Africa. Key ingredient in curricula orientation, as a critical input in modelling that type of graduate, is the integration of community engagement and agri-enterprise development in student training. Making use of the Bachelor of Agriculture (BAG) degree programme, the pioneer programme that kick-started the new training orientation, we conducted a tracer study to document employment characteristics, transition to employment and the level of satisfaction with training approach among the first five graduate cohorts (2009-2013) in 2014. Results showed that 84 % of the graduates were employed within the first six months after graduation. The employment rate surpassed 90 % after one year. About 80% of the graduates were employed in rural and semi-urban localities. Employment was in diverse sectors including government extension advisory services, financial institutions, non-governmental organisations, the private sector, agricultural research and graduate-own agro-based enterprise. Only 1.7 % of the graduates had established businesses. Most graduates were satisfied with job placement while over 90 % of the employers were contented with competencies exhibited by the graduates. This paper illustrates that integrating community engagement and enterprise development in student training contributes greatly to building competencies of agricultural graduates for the labour market.Item Non-attitudinal and non-knowledge based factors constrain households from translating good nutritional knowledge and attitude to achieve the WHO recommended minimum intake level for fruits and vegetables in a developing country setting: evidence from Gulu district, Uganda(BMC Nutrition, 2021) Kenyi, Benjamin; Bendere, Lomira; Nassanga, Prossy; Okello, Daniel Micheal; Ongeng, DuncanUrban and rural inhabitants met up to 72.0 and 62.4% of the RMDIL, respectively, with absolute intake being higher among urban than rural households by 37.54 g. NK and NA were good but the intensity of NK was higher among urban respondents by 11%. RDMIL was positively correlated with NA while socio-demographic predictors of RDMIL varied with household location. FGD revealed that primary agricultural production constraints, market limitations, postharvest management limitations, health concerns, social discomfort and environmental policy restrictions were the major NANK factors that hindered achievement of the RDMIL. Conclusions: These results indicate that NANK factors constrain households from translating good NA and NK to achieve the RMDIL.Item Dietary intake and socio-economic predictors of inadequate energy and nutrient intake among women of childbearing age in Karamoja sub-region of Uganda(Journal of Health, Population and Nutrition, 2023) Muggaga, Christopher; Okello‑Uma, Ipolto; Natigo, Archileo Kaaya; Taylor, David; Ongeng, Duncan; Basil, MugonolaKaramoja sub-region is the most food insecure part of Eastern Africa. The poor status of food security in the sub-region is reflected in the high rate of undernutrition among women of childbearing age (WCBA) and children under 5 years (CUFY). The sub-region is unique in Uganda in terms of cultural diversity, agro-ecology and rainfall pattern and agricultural practices. However, the influence of these unique characteristics on dietary intake of WCBA in the sub-region is less understood. Therefore, this study examined dietary intake and socio-economic predictors of inadequate energy and nutrient intake among WCBA in Karamoja sub-region.Item Optimization of pyrolysis conditions for production of rice husk-based bio-oil as an energy carrier(Elsevier, 2023-11-09) Wakatuntu, Joel; Olupot, Peter Wilberforce; Jjagwe, Joseph; Menya, Emmanuel; Okure, MackayBio-oil is an eco-friendly energy source with potential to substitute fossil-derived fuels. This study optimized pyrolysis conditions for production of bio-oil from rice husks. Response surface methodology based on central composite design was employed to maximize bio-oil yield and high heating value (HHV) while minimizing water and ash contents. The pyrolysis process conditions were; temperature (400–650 ◦C), heating rate (6000–9750 ◦Ch-1), and holding time (600–1800 s). Analysis of variance revealed that the linear model best fits the responses of bio-oil yield and water content. On the other hand, the quadratic model best fits the responses of HHV and ash content. Pyrolysis temperature had the greatest influence on each of the studied responses, followed by holding time and lastly heating rate. Optimum pyrolysis conditions were found to be; temperature (650 ◦C), heating rate (9750 ◦Ch-1), and holding time (1800 s), leading to bio-oil yield, HHV, water, and ash contents of 38.13%, 23.40 MJ/kg, 18.27%db, and 0.16%db, respectively. These results fall in the range of standard quality values for bio-oil in published literature where >15 MJ/kg, 20–30%, 0.15–0.25% are the recommended ranges for HHV, water, and ash contents, respectively. Results from the FTIR spectroscopy revealed that phenolic compounds contributed the most to bio-oil composition. Phenolic compounds positively influenced the quality of bio-oil due to their high calorific values. Gas chromatograph and mass spectrometry results showed peaks continuing to spill up to the maximum retention time indicating good thermal stability and bio-oil quality.Item Techno-economic assessment of municipal solid waste gasification for electricity generation:(CIGR Journal, 2015-10-14) Kivumbi, Bernard; Olwa, Joseph; Martin, Andrew; Menya, EmmanuelThis study was aimed at assessing the techno-economic potential of municipal solid waste (MSW) generated in Kampala City for electricity production through gasification. The quantity, characteristics, and gasification parameters were determined. In addition, the gasifier-engine system components were sized, and an economic analysis was conducted to obtain the net present value (NPV) and the payback period. This study found that 523 t/d of MSW is collected in Kampala City. The biomass component of MSW was found to be 459.5 t/d with a moisture content of 71.09% on an as-received basis. The physical characteristics of the gasified biomass included 11.8% moisture content, 88.2% total solids, 25.9% ash content and 57.7 kg/m3bulk density. The resulting normalized producer gas constituted 11.64% H2, 13.70% CO, 16.09% CO2, 54.12% N2, 4.45% CH4and a lower heating value (LHV) of 4.75 MJ/Nm3. The design fuel flow rate of 0.23 kg/s, specific gasification rate (SGR) of 5089.29 kg h-1m-2and specific energy demand of 42.75 GJ m-2h-1were obtained. This yields a net electrical power output of 425.17 kW with an overall efficiency of 15.6%. The net annual electricity generation from a single gasifier-engine system was found to be 2.97 GWh/a. The economic analysis for this system worth $887 333 of investment cost yielded a payback period of 6.57 years while the NPV at 6% interest rate was found to be nine years with a value of $316 47.