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Articles: Department of Water and Agricultural Resources Management: Recent submissions

Now showing items 21-40 of 202

Resistance to Pythium root rot and anthracnose among Kenyan common bean genotypes and marker-assisted introgression of resistance genes

Misango, Shamir; Otsyula, Reuben; Arunga, Esther E. (Taylor and Francis, 2022-12)

ABSTRACT Common bean (Phaseolus vulgaris L.) is an important food legume crop and major protein source in Kenya and many parts of the world. However, the yields are low due to the diseases like anthracnose caused by ...
Evaluating the surface functional groups on banana leaf petioles and the resultant biochar for potential adsorbance

Ndung’u, Paul W.; Mwithiga, Gikuru; Onyari, Charles N.; Muriithi, Genson; Mukono, Simon T. (JMES, 2020)

The presence of surface functional groups is key to the performance of an adsorbent material. The aim of this study was to evaluate the presence of functional groups on banana leaf petiole and on biochar made from ...
Rosemary (Rosmarinus officinalis L.) growth rate, oil yield and oil quality under differing soil amendments

Mwithiga, Gikuru; Maina, Samuel; Gitari, Josiah N.; Muturi, Phyllis (Heliyon, 2022)

In this work, we examined the influence of different soil amendments namely cow manure alone (Cm), cow manure plus fertilizer (Cm þ F), fertilizer alone (F) and unamended check, control on rosemary growth rate, fat content, ...
Farming systems’ typologies analysis to inform agricultural greenhouse gas emissions potential from smallholder rain-fed farms in Kenya

Musafiri, Collins M.; Macharia, , Joseph M.; Ng’etich, Onesmus K.; Kiboi, Milka N.; Okeyo, Jeremiah; Shisanya, Chris A.; Okwuosa, , Elizabeth A.; Mugendi, Daniel N.; Ngetich, Felix K. (Elsevier B.V, 2020)

Most sub-Saharan Africa smallholder farming systems are highly heterogeneous. Direct quantification of greenhouse gas emissions from these farming systems is hampered by di- versity at farm-level. Each farm contributes ...
The response of soil physicochemical properties to tillage and soil fertility resources in Central Highlands of Kenya

Kiboi, Milka N.; Muriuki, Anne; Ngetich, Felix K.; Adamtey, Noah; Mugendi, Daniel N. (Pagepress, 2020)

To attain agricultural sustainability, use of soil resources and tillage requires equal consideration for chemical and physical components of soil fertility. We assessed responses of selected soil physical and chemical ...
Phosphorus availability and exchangeable aluminum response to phosphate rock and organic inputs in the Central Highlands of Kenya

Omenda, Jane A.; Ngetich, Kipchirchir F.; Kiboi, Milka N.; Muna, Mucheru; Mugendi, Daniel N. (Heliyon, 2021)

Soil acidity and phosphorus deficiency are some of the constraints hampering agricultural production in tropical regions. The prevalence of soil acidity is associated with phosphorus (P) insufficiency and aluminum ...
Soil nutrients and crop yield response to conservation-effective management practices in the sub-humid highlands agro-ecologies of Kenya

Kiboi, Milka N.; Ngetich, Felix k.; Muna, Mucheru; Diels, J. Diels; Mugendi, Daniel N. (Heliyon, 2021)

Crop productivity in most smallholder farming systems in Sub-Saharan Africa experience low use of soil amendment resources, low and erratic rainfall, frequent dry spells, and droughts. Rain-fed agriculture has a high crop ...
Loss of pod strings in common bean is associated with gene duplication, retrotransposon insertion and overexpression of PvIND

Parker, Travis A.; Cetz, Jose; Lopes de Sousa, Lorenna; Kuzay, Saarah; Lo, Sassoum; Floriani, Talissa de Oliveira; Njau, Serah; Arunga, Esther E.; Duitama, Jorge; Jernstedt, Judy; Myers, James R.; Llaca, Victor (2022-06)

Fruit development has been central in the evolution and domestication of flowering plants. In common bean (Phaseolus vulgaris), the principal global grain legume staple, two main production categories are distinguished by ...
Performance assessment of Crosses between Gadam and Hardcore Tannin sorghum in hybrid lines production

Shinda, Cecilia A.; Gitari, Josiah N.; Nthakanio, Paul N.; Runo, Steven; Gichimu, Bernard M.; Maina, Samuel (2022-06)

Gadam cultivar of sorghum has been characterized by low yields compared to the international yield levels of sorghum. In this research, Gadam was crossed with Serena, Seredo, and Kari/Mtama-1 in an attempt to increase ...
Nutrient content of sorghum hybrid lines between Gadam and hard coat tannin sorghum cultivars

Shinda, Cecilia A.; Nthakanio, Paul N.; Gitari, Josiah N.; Runo, Steven; Mukono, Simon; Maina, Samuel (Wiley, 2022-06)

Sorghum is an important food crop in the world that exhibits a predominant role in fulfilling the nutritional requirements, particularly in low- income group populations of marginal areas in Kenya. It is a principal ...
Effects of Variety, Spacing and Nitrogen Application on Chickpea (Cicer arietinum) Growth and Yield in Embu County, Kenya

Wafula, Judith N.; Mugendi, Fredrick N.; Nthakanio, Paul N.; Mosioma, Jeremiah O.; Onyari, Charles N. (2022-02)

Chickpea is a pulse crop that is rich in proteins and helps in fulfilling the requirement of protein for vegetarian people thus yield maximization needed. This study aimed to determine the effects of spacing, nitrogen ...
Factors Affecting Multiple Climate Change Adaptation Practices of Smallholder Farmers in lower Eastern Kenya

Mogaka, Hezron R.; Muriithi, Lydia (Journal of Agricultural Extension, 2021-10)

The study investigated the socioeconomic and institutional factors influencing uptake of multiple climate change adaptation practices among smallholder farmers in lower Eastern Kenya. Multistage sampling procedure was used ...
Performance of vermicomposted wastes for tomato (Lycopersicon Esculentum Mill.), production: A case study of Embu, Kenya

Mochache, Miriam Ogake; Yegon, Rebecca; Ngetich, Onesmus (2021-10)

PurposeTo investigate the effect of vermicomposted kitchen, market and tea wastes on tomato growth and yield and assess the benefits and costs that arise. Method A field experiment arranged in the randomized complete ...
Phosphorus availability and exchangeable aluminum response to phosphate rock and organic inputs in the Central Highlands of Kenya

Omenda, Jane A.; Ngetich, F. K.; Kiboi, Milka N.; Mucheru-Muna, M.; Mugendi, Daniel N. (Heliyon, 2021-03)

Soil acidity and phosphorus deficiency are some of the constraints hampering agricultural production in tropical regions. The prevalence of soil acidity is associated with phosphorus (P) insufficiency and aluminum ...
Genetics of dual resistance to african stem borer, busseola fusca and spotted stem borer, Chilo partellus in sorghum

Phyllis, W. Muturi; Mgonja, M.; Rubaihayo, P. (Springer Link, 2021-02)

African stem borer, Busseola fusca Fuller (Noctuidae) and spotted stem borer, Chilo partellus Swinhoe (Crambidae) cause more than 40 % of grain yield loss in cereals and bothpests co-exist in mid-altitudes in Kenya. ...
Flower visitors of Streptocarpus teitensis: implications for conservation of a critically endangered African violet species in Kenya

Otieno, Mark; Josh, Neelendra; Rutschmann, Benjamin (PeerJ, 2021-01)

Background: The African violets are endangered plant species restricted mainly to the Eastern Arc Mountains biodiversity hotspots in Kenya and Tanzania. These plants grow well in shaded environments with high humidity. ...
Characterization of the Volatile Components of Essential Oils of Selected Plants in Kenya

Mugao, Lydia G.; Gichimu, Bernard M.; Muturi, Phyllis W.; Mukono, Simon T. (Hindawi, 2020-12)

Essential oils are secondary metabolites that plants produce for protection from pests and predators, attraction of pollinators, and seed dispersal. )e oils are made up of a mixture of compounds that give a characteristic ...
Assessment of genetic variability of passion fruit using simple sequence repeat (SSR) markers

Chepkoech, Emmy; Rotich, Felix; Alkamoi, Bonface (Integrity, 2020-10)

Purple passion fruit (Passiflora edulis Sims) is the third most important fruit crop in Kenya that is produced for both local and export markets. In Uasin Gishu County, passion fruit had recently emerged as an important ...
Soil Greenhouse Gas Fluxes From Maize Production Under Different Soil Fertility Management Practices in East Africa

Macharia, Joseph M.; Pelster, David E.; Ngetich, Felix K.; Shisanya, Chris A.; Mucheru-Muna, Monicah; Mugendi, Daniel N. (2020-06)

In sub-Saharan Africa (SSA), few studies have quantified greenhouse gas (GHG) emissions following application of soil amendments, for development of accurate national GHG inventories. Therefore, this study quantified soil ...
Suitability of different data sources in rainfall pattern characterization in the tropical central highlands of Kenya

Oduor, Nathan O.; Ng'etich, Felix K.; Kiboi, Milka N.; Muriuki, Anne; Adamtey, Noah; Mugendi, Daniel N. (Heliyon, 2020-11)

Uncertainty in rainfall pattern has put rain-fed agriculture in jeopardy, even for the regions considered high rainfall potential like the Central Highlands of Kenya (CHK). The rainfall pattern in the CHK is spatially and ...

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