Browsing School of Science, Technology and Engineering by Author "Onkware, Augustino"
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Assessment of temporal primary production in tropical inland swamp wetlands of Uasin Gishu county, Kenya
Onkware, Augustino; Mulei, Josephine M.; Otieno, Donald F. (2018-07-03)Wetlands are highly productive ecosystems offering valuable ecosystem and socio-economic services. Worldwide they are threatened by encroachment due to increasing human population. Limited research has been done on the ... -
Assessment of temporal primary production in tropical inland swamp wetlands of Uasin Gishu County, Kenya
Josephine M. Mulei; Onkware, Augustino; Donald F. Otieno (J. Wetlands Biodiversity, 2018-07-03)Wetlands are highly productive ecosystems offering valuable ecosystem and socio-economic services. Worldwide they are threatened by encroachment due to increasing human population. Limited research has been done on the ... -
Cell membrane integrity, callose accumulation, and root growth in aluminum-stressed sorghum seedlings
Emily Jepkosgei Too; Beatrice Ang’iyo Were; Onkware, Augustino; Anders S. Carlsson; Mulatu Geleta; Gudu, Samuel; T. Bryngelsson (2015-08-21)Aluminum stress usually reduces plant root growth due to the accumulation of Al in specific zones of the root apex. The objectives of this study were to determine the localization of Al in the root apex of Sorghum bicolor ... -
Cell membrane integrity, callose accumulation, and root growth in aluminum-stressed sorghum seedlings
Gudu, Samuel; Onkware, Augustino; Emily Jepkosgei Too; Beatrice Ang’iyo Were; Anders S. Carlsson; Mulatu Geleta; T. Bryngelsson (2015-08-19)Aluminum stress usually reduces plant root growth due to the accumulation of Al in specific zones of the root apex. The objectives of this study were to determine the localization of Al in the root apex of Sorghum bicolor ... -
Combining ability of some sorghum lines for dry lands and sub-humid environments of East Africa
Rathore Abhishek; Beatrice Ang’iyo Were; Mary Mgonja; Deshpande Santosh; Mneney Emmarold; Onkware, Augustino; Gudu, Samuel; Ringo Justin (2015-08-19)Sorghum (Sorghum bicolor L. Moench) is a major food crop grown in dry lands and sub-humid areas of East Africa. A study was conducted between 2010 to 2012 in dry lands (Miwaleni, Kiboko) and sub- humid (Ukiriguru) ... -
Effects of physico-chemical parameters on abundance and biomass of phytoplankton in chebara reservoir-Kenya
Onkware, Augustino; Manyala, Julius O.; Ojunga, Salome (2017-04)River impoundment creates reservoirs of varying sizes that supply water for multiple uses including electric power generation, domestic, agriculture or industry. However, damming of rivers creates an aquatic habitat of ... -
An Ethnobotanical Study of Swamp Wetland Vegetation in Uasin Gishu County, Kenya
Josephine Mumbe Mulei; Donald F. Otieno; Onkware, Augustino (2015-08-21)Ethnobotanical knowledge associated with wetland plants in Uasin Gishu County, Kenya, was assessed and docu- mented. Data on the uses of plants, their local names, and parts used were collected through semi-structured ... -
Genetic Diversity in Cultivated Sesame (Sesamum indicum L.) and Related Wild Species in East Africa
Gudu, Samuel; Otto George Dangasuk; Beatrice Ang’iyo Were; Benson Ouma Nyongesa; Onkware, Augustino (2015-08-21)Genetic diversity of traditional sesame landraces and related wild species in East Africa remains largely unexplored. Knowing what fraction of the available genetic diversity is actually used by the farmers is of central ... -
Genetic relationship between sesame (Sesamum indicum L.) and related wild species based on chromosome counts and isozyme markers
Onkware, Augustino; Beatrice Ang’iyo Were; Gudu, Samuel; Benson Ouma Nyongesa; Otto George Dangasuk (2015-08-19)Sesame is an orphan crop with little research attention in Kenya. Genetic relationship between cultivated sesame and related wild species in Kenya is not well known. The objective of this study was to determine genetic ... -
Impact of a Kraft Pulp and Paper Mill Effluent on Phytoplankton and Macroinvertebrates in River Nzoia, Kenya
Kingiri Senelwa; Frank O. Masese; Julius O. Manyala; Lazare Etiégni; Onkware, Augustino; Philip O. Raburu; Salome Ojunga; Elijah S. Omutange; B. K. Balozi (2015-08-21)Phytoplankton and macroinvertebrate assemblages were used to assess the impact of a kraft pulp and paper mill effluent in Kenya, on River Nzoia downstream of the discharge point in relation to changes in water quality ... -
Mycorrhizal Development and Phosphorus Concentration in selected Kenyan Sorghum Cultivars
Rasowo, Brenda; Muthuri, Jacinta; Ndiema, Philip; Onkware, Augustino (2015-08-19)This study was carried out on sorghum genotypes that exhibited significant difference in growth and production on P-deficient soils. The objective was to find out if the genotypes developed different levels of mycorrhizal ... -
Phylogenetic relationship among Kenyan sorghum germplasms based on aluminium tolerance
Emily Jepkosgei Too; Gudu, Samuel; Cheprot, Reuben K.; Matonyei, Thomas; Were, Beatrice Ang’iyo; Onkware, Augustino; Dangasuk O. George; Ouma, Evans; Liu, J; Kochian, L. V. (2015-08-21)Eighty nine (89) sorghum lines sourced from various parts of Kenya were used to determine phylogenetic relationships based on 10 DNA fragments at AltSB loci with SbMATE, ORF9 and MITE primers. Nine lines of varying ... -
Physiological characterization of kenyan sorghum lines for tolerance to aluminium
Matonyei, Thomas; Cheprot, Reuben K.; Maritim K. K.; Beatrice Ang’iyo Were; Dangasuk O. George; Onkware, Augustino; Gudu, Samuel (2015-08-21)Eighty nine Kenyan sorghum lines were screened for tolerance to aluminium toxicity in nutrient solution. Relative net root growth; root tip aluminium content and variation in organic acid exudation were used to determine ... -
Response of Leucaena leucocephala (Lam.) De Wit (Leucaena) Provenances to Aluminium in Potted Soil Experiment
Onkware, Augustino; Gudu, Samuel; Palapala, Valerie; Kisinyo, Peter (2015-08-21)Aims: To determine the level of acid or aluminium tolerance provenances in Leucaena (Leucaena leucocephala) a favourite agroforestry tree in Kenya. Study Design: The set up was a 2-factor (provenance-aluminium) experiment ... -
Response of selected sorghum (Sorghum bicolor L. Moench) germplasm to aluminium stress
Evans, Ouma; Emily Jepkosgei Too; Beatrice Ang’iyo Were; Onkware, Augustino; Justin Hanson Ringo; Kisinyo, Peter; Anders S. Carlsson; Mulatu Geleta; Mulatu Geleta (2015-08-19)Sorghum (Sorghum bicolor L. (Moench) is an important food security crop in sub-Saharan Africa. Its production on acid soils is constrained by aluminium (Al) stress, which primarily interferes with root growth. Sorghum ... -
Sensory evaluation and consumer acceptability of Snack ValueAdded Rice Products in Eldoret Town, Kenya
Mugalavai, Violet; Onkware, Augustino; Mutinda, Victoria; Aduol, Kevin; Oyalo, Josiah (IOSR Journal of Humanities And Social Science (IOSR-JHSS), 2020-07-31)Farmers in developing countries are greatly affected by post-harvest losses due to poor handling techniques, over maturation, poor storage conditions, infestation by pests and fungal infections. This explains the high ... -
Spatial and temporal variation in community structure of phytoplankton in chebara reservoir-Kenya
Onkware, Augustino; Manyala, Julius O.; Ojunga, Salome (International Journal of Advanced Research in Management and Social Sciences, 2017-04)River impoundments create reservoirs for many of varying, sizes which serve one or more functions, and change transform lotic aquatic systems to lentic ones, with changes in physical and chemical properties, biotic assemblage ... -
Vegetation community structure and diversity in swamps undergoing anthropogenic impacts in Uasin Gishu County, Kenya
Mulei, Josephine M.; Onkware, Augustino; Otieno, Donald F. (International Scholars Journals, 2016-02)Wetlands in Kenya face continuous threat of destruction by agricultural activies, urbanization and pollution. However, their floristic compositions remain unkown since research remains restricted to ...