Browsing PHD-Department of Agricultural Sciences and Technology by Title
Now showing items 1-17 of 17
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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 ... -
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 ... -
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 ... -
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 ... -
Identification and characterization of Sorghum (sorghum bicolor (l.) Moench) landraces and improvement of on-farm seed production in Eastern Kenya
(2014-08-19)Sorghum (Sorghum bicolor (L.) Moench) is an under-utilized crop that is tolerant to drought, flooding, saline-alkaline, infertile soils and high temperature. Farmers maintain landraces through preference selection ... -
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 ... -
Improving soil properties and growth of casuarina equisetifolia through use of biochar, manure and inorganic fertilizer in kilifi county, kenya
(Kenyatta University, 2023)Soil fertility challenges coupled with frequent droughts in arid and semi-arid lands (ASALs) have led to massive crop failures thereby increasing the problem of food insecurity. As climate change unfolds, there is a need ... -
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 ... -
Molecular characterization and non-chemical management of root-knot nematodes (meloidogyne spp.) on African nightshades in selected parts of Kenya
(Kenyatta University, 2016-04)Root-knot nematodes (RKN) (Meloidogyne spp.) cause up to 80 % yield losses in infected vegetables. A study was carried out to; assess the influence of farmers’ knowledge and awareness on RKN damage on African nightshades ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
Seed Quality of Soybean (Glycine Max [L.] Merrill) Genotypes under Varying Storage and Priming Methods, Mother Plant Nutrient Profiles and Agro-Ecologies in Kenya
(Kenyatta University, 2015-10)world. The demand for soybeans in Kenya is high yet production is negligible due to various challenges, one of which is lack of a well-organized soybean seed system. Soybean seed has been known to deteriorate rapidly in ... -
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 ...
