PHD-School of Agriculture And Enterprise Development
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This collections contains bibliographic information and abstracts of PHD theses and dissertation in the School of Agriculture and Enterprise Development held in Kenyatta University Library
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Assessing nitrogen flows and greenhouse gas emissions in low input cropping systems of lake Victoria basin
(Kenyatta university, 2022-12)Too little nitrogen (N) is a threat to cropping systems and soil fertility in sub-Saharan Africa (SSA). Nitrogen budgets (NB) and nitrogen use efficiency (NUE) are critical tools for assessing N dynamics in agriculture ... -
Assessing Nitrogen Flows and Greenhouse Gas Emissions in Low Input Cropping Systems of Lake Victoria Basin
(Kenyatta University, 2022)Too little nitrogen (N) is a threat to cropping systems and soil fertility in sub-Saharan Africa (SSA). Nitrogen budgets (NB) and nitrogen use efficiency (NUE) are critical tools for assessing N dynamics in agriculture and ... -
Analysis of Factors, Cost-Benefit Analysis and Effects of Value Addition Strategies on Cashew Products Processed in South-East Zone, Nigeria
(2022)Nigeria government has over the years come up with different agricultural policy interventions which emphasize value addition to export crops including cashew as a means of job and wealth creations. Despite these interventions, ... -
Economic Analysis of Environmental Conditional Credit as Incentive for Soil and Water Managemnt in Sasumua Sub-Watershed, Nyandarua County, Kenya
(Kenyatta University, 2022)This study used action research to assess demand for environmental conditional credit as an incentive for soil and water conservation. Credit amounts were incremental with decreasing interest rates with conditions of soil ... -
Impact of Human Capital Development and Fixed Capital Formation on Agriculture Productivity in Uganda
(Kenyatta University, 2022)This study was inspired by the fact that Uganda‟s economic development prospect is intertwined with agriculture sector growth. The country has 80% of arable land, but only 35% is under production majorly using subsistence ... -
Integration of Thymol, Soil Improvers and Biostimulants for Management of Tomato Pests, Diseases, Nematodes and Rhizosphere Microbial Dynamics Kirinyaga County, Kenya
(Kenyatta University, 2022)Soil-borne pathogens, root knot nematodes and insect pests remain a major constraint to tomato Solanum lycopersicum L. (Solanales; Solanaceae) production in Kenya. The study was carried out with an aim of evaluating the ... -
Impact of Improved Sorghum Varieties on Poverty Reduction among Rural Farming Households in Tharaka Nithi County, Kenya
(Kenyatta University, 2021)Poverty alleviation and attainment of food security are among the major concerns facing majority of households in arid and semi-arid land areas of Kenya. The Government of Kenya in partnership with other sector stakeholders ... -
Pyramiding of Genes Conferring Resistance to Coffee Berry Disease Using Marker Assisted Selection
(Kenyatta University, 2021)The epidemics of Coffee Berry Disease (CBD), caused by Colletotrichum kahawae, destroy up to 80% of the crop on susceptible varieties if not controlled. CBD control using fungicides increases production cost and environmental ... -
Identification of Stem End Rot Fungal Pathogens on Avocado Fruits and Efficiency of Fungicides and Trichoderma spp. in Murang’a County, kenya
(Kenyatta University, 2021)Avocado (Persea americana Mill.) is a commercially important fruit cultivated in tropical and sub-tropical climates. In Kenya the fruit is cultivated for both local and export market, significantly contributing to the ... -
Effects of Supply Chain Management Practices on Competitive Advantage and Organizational Performance of the Dairy Processing Firms in Kenya
(Kenyatta University, 2021)Under capacity, utilization has profound effects on the efficiency, flexibility and responsiveness of the dairy processing firms in Kenya. Further, under capacity utilization has negatively impacted the competitiveness ... -
Production of Organic Fertilizer from Black Soldier Fly Frass for Improved Soil Health and Maize Productivity in Nairobi City County, Kenya
(Kenyatta University, 2021)Use of organic wastes for Black soldier fly (BSF) farming presents an avenue that could contribute to improved crop yield and sustainable soil health. A major waste from BSF farming is frass which, however, generates organic ... -
Quantifying Greenhouse Gas Emissions and Carbon Stocks in Maize-Soybean Cropping Systems in Siaya County, Kenya
(Kenyatta University, 2020-11)As climate change continues to threaten ecosystems’ functions, agriculture remains one of the major source of greenhouse gas (GHG) emissions that are responsible for global warming. The major GHG in agriculture are; carbon ... -
Performance of Amaranth Accessions against Moisture Stress and Key Insect Pests and Their Indigenous Parasitoids in Arusha, Tanzania
(Kenyatta University, 2019)Amaranths are African indigenous vegetables (AIVs) that have recently gained importance as a food source in Africa owing to the high nutritional value of their leaves and grains. Production of this crop is, however, limited ... -
Fingerprinting and Relating Juvenile Characters of Rice to Yield and Yield Components in Kiambu and Kirinyaga Counties
(Kenyatta University, 2019-02)Rice is increasing as an important food and cash crop in Kenya and is third to maize and wheat in terms of consumption. Consumption has continually outstripped production resulting in massive importation. The main problem ... -
Soil Moisture Conservation, Cropping Systems and Soil Fertility Effects on Soil and Maize Performance in Machakos County, Kenya
(Kenyatta University, 2019-05)The main causes of food insecurity in semi–arid parts of Kenya are low soil fertility, low and unreliable rainfall. These two causes are the main challenges facing small-scale farmers in food production especially in ...
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Assessing nitrogen flows and greenhouse gas emissions in low input cropping systems of lake Victoria basin
(Kenyatta university, 2022-12)Too little nitrogen (N) is a threat to cropping systems and soil fertility in sub-Saharan Africa (SSA). Nitrogen budgets (NB) and nitrogen use efficiency (NUE) are critical tools for assessing N dynamics in agriculture ... -
Assessing Nitrogen Flows and Greenhouse Gas Emissions in Low Input Cropping Systems of Lake Victoria Basin
(Kenyatta University, 2022)Too little nitrogen (N) is a threat to cropping systems and soil fertility in sub-Saharan Africa (SSA). Nitrogen budgets (NB) and nitrogen use efficiency (NUE) are critical tools for assessing N dynamics in agriculture and ... -
Analysis of Factors, Cost-Benefit Analysis and Effects of Value Addition Strategies on Cashew Products Processed in South-East Zone, Nigeria
(2022)Nigeria government has over the years come up with different agricultural policy interventions which emphasize value addition to export crops including cashew as a means of job and wealth creations. Despite these interventions, ... -
Impact of Human Capital Development and Fixed Capital Formation on Agriculture Productivity in Uganda
(Kenyatta University, 2022)This study was inspired by the fact that Uganda‟s economic development prospect is intertwined with agriculture sector growth. The country has 80% of arable land, but only 35% is under production majorly using subsistence ... -
Economic Analysis of Environmental Conditional Credit as Incentive for Soil and Water Managemnt in Sasumua Sub-Watershed, Nyandarua County, Kenya
(Kenyatta University, 2022)This study used action research to assess demand for environmental conditional credit as an incentive for soil and water conservation. Credit amounts were incremental with decreasing interest rates with conditions of soil ... -
Integration of Thymol, Soil Improvers and Biostimulants for Management of Tomato Pests, Diseases, Nematodes and Rhizosphere Microbial Dynamics Kirinyaga County, Kenya
(Kenyatta University, 2022)Soil-borne pathogens, root knot nematodes and insect pests remain a major constraint to tomato Solanum lycopersicum L. (Solanales; Solanaceae) production in Kenya. The study was carried out with an aim of evaluating the ... -
Impact of Improved Sorghum Varieties on Poverty Reduction among Rural Farming Households in Tharaka Nithi County, Kenya
(Kenyatta University, 2021)Poverty alleviation and attainment of food security are among the major concerns facing majority of households in arid and semi-arid land areas of Kenya. The Government of Kenya in partnership with other sector stakeholders ... -
Pyramiding of Genes Conferring Resistance to Coffee Berry Disease Using Marker Assisted Selection
(Kenyatta University, 2021)The epidemics of Coffee Berry Disease (CBD), caused by Colletotrichum kahawae, destroy up to 80% of the crop on susceptible varieties if not controlled. CBD control using fungicides increases production cost and environmental ... -
Identification of Stem End Rot Fungal Pathogens on Avocado Fruits and Efficiency of Fungicides and Trichoderma spp. in Murang’a County, kenya
(Kenyatta University, 2021)Avocado (Persea americana Mill.) is a commercially important fruit cultivated in tropical and sub-tropical climates. In Kenya the fruit is cultivated for both local and export market, significantly contributing to the ... -
Effects of Supply Chain Management Practices on Competitive Advantage and Organizational Performance of the Dairy Processing Firms in Kenya
(Kenyatta University, 2021)Under capacity, utilization has profound effects on the efficiency, flexibility and responsiveness of the dairy processing firms in Kenya. Further, under capacity utilization has negatively impacted the competitiveness ... -
Production of Organic Fertilizer from Black Soldier Fly Frass for Improved Soil Health and Maize Productivity in Nairobi City County, Kenya
(Kenyatta University, 2021)Use of organic wastes for Black soldier fly (BSF) farming presents an avenue that could contribute to improved crop yield and sustainable soil health. A major waste from BSF farming is frass which, however, generates organic ... -
Quantifying Greenhouse Gas Emissions and Carbon Stocks in Maize-Soybean Cropping Systems in Siaya County, Kenya
(Kenyatta University, 2020-11)As climate change continues to threaten ecosystems’ functions, agriculture remains one of the major source of greenhouse gas (GHG) emissions that are responsible for global warming. The major GHG in agriculture are; carbon ... -
Performance of Amaranth Accessions against Moisture Stress and Key Insect Pests and Their Indigenous Parasitoids in Arusha, Tanzania
(Kenyatta University, 2019)Amaranths are African indigenous vegetables (AIVs) that have recently gained importance as a food source in Africa owing to the high nutritional value of their leaves and grains. Production of this crop is, however, limited ... -
Fingerprinting and Relating Juvenile Characters of Rice to Yield and Yield Components in Kiambu and Kirinyaga Counties
(Kenyatta University, 2019-02)Rice is increasing as an important food and cash crop in Kenya and is third to maize and wheat in terms of consumption. Consumption has continually outstripped production resulting in massive importation. The main problem ... -
Soil Moisture Conservation, Cropping Systems and Soil Fertility Effects on Soil and Maize Performance in Machakos County, Kenya
(Kenyatta University, 2019-05)The main causes of food insecurity in semi–arid parts of Kenya are low soil fertility, low and unreliable rainfall. These two causes are the main challenges facing small-scale farmers in food production especially in ... -
Characterization, Water Stress and Nutrient Management of Yellow Passion Fruits (Passiflora Edulis, Var F. Flavicarpa. Deg) in Kiambu and Embu Counties, Kenya
(Kenyatta University, 2019-06)Passion fruit has gained significant importance as a horticultural crop of choice among farmers in Kenya. The yellow passion has been recently commercialized in Embu County due to its adaptation to the hot arid conditions ... -
Combined Effects of Tillage, Mulching and Nitrogen Fertilizer Application on Maize Yields and Soil Properties in Tharaka-Nithi County, Kenya
(Kenyatta University, 2018-09)High dependence on rain-fed agriculture, low and erratic rainfall, inadequate water and soil conservation techniques and declining soil fertility expose resource-poor farmers to low agricultural productivity in tropical ... -
Population dynamics and management of vectors of viruses causing maize lethal necrosis disease in Bomet County Kenya
(Kenyatta University, 2018-04)Maize production in Kenya is under threat due to infection by maize lethal necrosis disease (MLND). The disease is known to cause intensive complete yield loss. It is caused by a synergistic infection of maize by maize ... -
Economics of biological control of cereal stemborers in Eastern Africa: a case study of maize and sorghum production in Kenya
(Kenyatta University, 2018-01)The International Centre of Insect Physiology and Ecology (icipe), undertook a biological control (BC) programme for control of stemborers from 1993 to 2008, to reduce cereal yield losses due to stemborer attack in East ... -
Assessment of efficiency of agro food marketing systems: a case of macadamia nuts value chain in the Central Kenya highlands
(Kenyatta University, 2018-07)ABSTRACT The macadamia industry in Kenya has been faced with numerous operational and marketing challenges forcing the government to impose export ban of raw nuts since 2008 to date. The then Ministry of Agriculture ...
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