Journal Articles: Recent submissions
Now showing items 2121-2140 of 29939
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Effect of rangeland rehabilitation on the herbaceous species composition and diversity in Suswa catchment, Narok County, Kenya
(University of Nairobi, 2017)Introduction: Land degradation is a serious environmental problem of our time. In Kenya, it is estimated that 30% of the total land mass is severely degraded. Suswa catchment within Narok County is a good example with ... -
Effects of Land Use and Land Cover changes on Soil Organic Carbon and Total Nitrogen Stocks in the Olesharo Catchment, Narok County, Kenya
(University of Nairobi, 2018)Land Use and Land Cover Change (LULCC) is the most prominent cause of Soil Organic Carbon (SOC) variability in any landscape. Kenyan Arid and Semi-Arid Lands (ASALs) have been facing extensive land use/ cover changes in ... -
Pasture enclosures increase soil carbon dioxide flux rate in Semiarid Rangeland, Kenya
(University of Nairobi, 2018)Background Pasture enclosures play an important role in rehabilitating the degraded soils and vegetation, and may also influence the emission of key greenhouse gasses (GHGs) from the soil. However, no study in East Africa ... -
Enhancing soil organic carbon, particulate organic carbon and microbial biomass in semi-arid rangeland using pasture enclosures
(University of Nairobi, 2018)Background Rehabilitation of degraded rangelands through the establishment of enclosures (fencing grazing lands) is believed to improve soil quality and livelihoods, and enhance the sustainability of rangelands. Grazing ... -
Plant Extracts And Antagonistic Fungi As Alternatives To Synthetic Pesticides In Management Of Fungal Diseases Of Tomato
(University of Nairobi, 2016)Incorporation of biological pesticides in integrated pest management has lately been considered effective in production of safe food for human consumption, aesthetically valuable for the prime markets and increase in crop ... -
Biopesticide-based IPM systems to reduce synthetic pesticide residues in vegetables for niche market access by small holder growers
(University of Nairobi, 2016)In the last few decades, farmers have relied on synthetic pesticides to managed crop pests and diseases. This is because synthetic pesticides are easily available, have quick knock down effect, have varied modes of action ... -
Short-term dynamics of soil organic matter fractions and microbial activity in smallholder potato-legume intercropping systems
(University of Nairobi, 2019)Continuous cultivation of potato (Solanum tuberosum L.) in monoculture systems represents the greatest factor deteriorating soil organic matter (SOM) in smallholder farms. With an aim to breaking this norm, a 2-year field ... -
Controlling soil erosion in smallholder potato farming systems using legume intercrops
(University of Nairobi, 2019)Competition for nitrogen (N) and phosphorous (P) under potato-based intercropping systems decreases the level of nutrients available for potato and subsequently influences nitrogen and phosphorous use efficiency. A field ... -
Nitrogen and phosphorous uptake by potato (Solanum tuberosum L.) and their use efficiency under potato-legume intercropping systems
(University of Nairobi, 2018)Competition for nitrogen (N) and phosphorous (P) under potato-based intercropping systems decreases the level of nutrients available for potato and subsequently influences nitrogen and phosphorous use efficiency. A field ... -
Optimizing yield and economic returns of rain-fed potato ( Solanum tuberosum L.) through water conservation under potato-legume intercropping systems
(University of Nairobi, 2018)Even though potato (Solanum tuberosum L.)-based intercropping systems are widely practised in developing countries, only a few studies have focused on legumes as the companion intercrops. This study was conducted to assess ... -
Potato-legume intercropping on a sloping terrain and its effects on soil physico-chemical properties
(University of Nairobi, 2019)Aims To assess the effects of potato-legume intercropping on selected soil physical and chemical properties after four consecutive growing seasons (from the short rains in 2014 to long rains 2016). Methods The experiment ... -
Combining Ability for Drought Tolerance in Upland Rice Varieties at Reproductive Stage
(University of Nairobi, 2017)Rice is an important food crop for human population ranking second among the mostly consumed cereal grains worldwide. Upland rice production is greatly constrained by drought stress resulting from rainfall variation patterns. ... -
Identification Of Resistance Sources To Wheat Stem Rust From Introduced Genotypes In Kenya
(University of Nairobi, 2017)Stem rust Puccinia graminis Pers. f. sp. tritici of wheat is the most important disease in Kenya. Emergence of race Ug99 and other variants virulent to host resistance genes including Sr31 has rendered 95% of Kenyan cultivars ... -
Viability and Dormancy of Rice Seeds after Storage and Pre-Treatment with Dry Heat and Chemical Agents
(University of Nairobi, 2017)Inappropriate seed packaging and seed dormancy affects seed quality and consequently leads to reduced crop stand, low seedling vigour and reduced yields. The objective of the study was to determine the effect of seed ... -
Assessment of Farmers Maize Production Practices and Effect of Triple-Layer Hermetic Storage on the Population of Fusarium Spp. and Fumonisin Contamination
(University of Nairobi, 2016)Abstract Fumonisin contamination of maize by Fusarium spp. is a major risk in food security, human and animal health. A study was carried out in Kaiti District, Makueni County in Kenya, to assess the effectiveness of ... -
Effect of Soil Fertility and Intercropping on the Incidence and Severity of Root Rot Diseases of Common Bean (Phaseolus vulgaris L.)
(University of Nairobi, 2017)High occurrence of root rots is attributed to continuous and inappropriate cropping systems, low soil fertility levels, low moisture in soil, use of farm saved seeds and use of root rot susceptible bean (Phaseolus vulgaris ... -
Efficacy of Plant Extracts and Antagonistic Fungi in Managing Tomato Pests and Diseases under Field Conditions
(University of Nairobi, 2017)The objective of this study was to evaluate the effectiveness of plant extracts and fungal antagonists in managing pests and diseases of tomato under field conditions. The extracts and the antagonists were evaluated for ... -
The use of near infrared transmittance kernel sorting technology to salvage high quality grain from grain downgraded due to Fusarium damage
(University of Nairobi, 2017)The mycotoxins associated with specific Fusarium fungal infections of grains are a threat to global food and feed security. These fungal infestations are referred to as Fusarium Head Blight (FHB) and lead to Fusarium ... -
Effect of Time after Incorporation of Lablab Green Manure on Root Rot Pathogens and Establishment of Common Bean (Phaseolus vulgaris L.)
(University of Nairobi, 2018)Green manure incorporation is important for restoration of soil quality, particularly buildup of organic matter and supply of nutrients to plants. However, undecomposed plant residues reduce crop establishment and plant ... -
Effect of Lablab Green Manure on Population of Soil Microorganisms and Establishment of Common Bean (Phaseolus vulgaris L.)
(University of Nairobi, 2018): Green manures improve soil health and fertility but application of undecomposed lablab residues lead to low crop establishment. The study was carried out to determine the effect of green manure on microbial population ...
