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A critical review of selected appropriate traditional evaporative cooling as postharvest technologies in Eastern Africa CIGR Journal
Wanyama, Joshua.
The issue of postharvest losses (PHL) is of high importance in the efforts to combat hunger, raise income and improve food security in the world’s poorest countries. PHL of horticultural products in developing countries sometimes may reach up to 45%. PHL have an impact on food security for poor people, food quality and safety, economic development and the environment. The exact causes of PHL vary throughout the world and are very much dependent on the specific conditions and local situation in a given country. Irrespective of the level of economic development and maturity of systems in a country, PHL should be kept to a minimum. PHL of horticultural products in developing countries sometimes may reach up to 45%. The failure to harness the physical and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural and Bio-systems Engineering Perishables; Technologies; Technology use; Shelf life; Storage food processing.
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3357
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Performance evaluation and optimization of the maize shelling operation of the multi-purpose farm vehicle CIGR Journal
Kabenge, Isa; Nsubuga, Denis; Zziwa, Ahamada; Kiggundu, Nicholas; Wanyama, Joshua; Banadda, Noble.
Small-scale farmers register high postharvest losses partly due to failure to carry out primary processing operations. Most of the maize shellers on the Ugandan market lead to high percentage of broken maize grains thus raising the risk of aflatoxin infection during storage. In this study, the operation of an existing maize sheller on the market with a shelling speed of 870 rpm for maize at 13 % moisture content was tested. The main objective of this study therefore was twofold; (i) to develop and evaluate a maize sheller and (ii) to optimize the multi-purpose vehicle shelling operation. The improved maize sheller was designed, fabricated, evaluated and optimized using a factorial experiment with shelling speed and moisture content as the main effects at...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Maize Shelling; Multipurpose vehicle; Physical properties; Engineering properties.
Ano: 2020 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5873
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Profiling Agricultural Engineering Technologies for Mechanizing Smallholder Agriculture in Uganda CIGR Journal
Wanyama, Joshua.
Developing countries are grappling with numerous challenges including feeding rapidly growing populations, alleviating poverty, protecting the environment and mitigating adverse impacts of climate change. For the coming years, one of the main agricultural development agenda for Sub-Saharan Africa (SSA) should be to increase agricultural productivity and production to achieve food security through agricultural mechanization with Agricultural Engineering Technologies (AETs) as major inputs. However, there is paucity of information on the status of existing AETs and their contribution to mechanizing smallholder agriculture which is crucial to effective planning and strategy formulation. Therefore, the overarching objective of this paper is to review past and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural and Bio-systems Engineering Agricultural engineering; Mechanization; Smallholder farmers; Food security.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3823
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Rainwater harvesting knowledge and practice for agricultural production in a changing climate: A review from Uganda’s perspective CIGR Journal
Kiggundu, Nicholas; Wanyama, Joshua; Mfitumukiz, David; Twinomuhangi, Revocatus; Barasa, Bernard; Katimbo, Abia; Kyazze, Florence.
With a changing climate in Uganda, rainfall distribution patterns have become more irregular over time and space. Excess water during rainy season is causing runoff, soil erosion, nutrient depletion and crop damage which reduce the productive capacity of land, while on the other hand, prolonged droughts during the crop growing period have become common occurrences. Additionally, pastoralists lose livestock during the dry period each year in the Cattle Corridor of Uganda due to water shortage and lack of forage. It thus remains difficult to achieve the agricultural development targets identified in the National Development Plan for Uganda, without addressing regular incidences of adverse impacts of climate change. Currently there are no well explained...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rainwater harvesting; Agricultural production; Changing climate Rainwater harvesting Smallholder Pastoralists Climate Change adaptation Food Security Crop Production Livestock Production.
Ano: 2018 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4682
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Solar Fruit Drying Technologies for small holder farmers in Uganda. A Review of Design Constraints and Solutions CIGR Journal
Wanyama, Joshua.
Solar fruit drying is a technology that is successfully applied on both domestic and commercial scale among smallholder farmers in Uganda. However, existing solar drying technologies are marred with multiple deficiencies such as inefficient conversion of trapped solar radiation to meet required enthalpy, low throughput, long drying times, and inherent difficulty to achieve acceptable hygiene among others. This review examines existing solar drying technologies in Uganda, highlighting design constraints and plausible solutions for supporting the growing fruit drying industry. The common types of solar driers in Uganda are the static-bed box type solar dryer model, the PPI tunnel solar dryer model, the NRI Kawanda cabinet solar dryer, the hybrid tunnel solar...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural and Bio-systems Engineering Solar fruit dryer; Smallholder farmers; Constraints; Design solutions.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3713
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