Browsing by Author "Onyari, Charles N."
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Adoption Determinants of Adapted Climate Smart Agriculture Technologies Among Smallholder Farmers in Machakos, Makueni, and Kitui Counties of Kenya
Muriithi, Lydia N.; Onyari, Charles N.; Mogaka, Hezron R.; Gichimu, Bernard M.; Gatumo, Geoffrey N.; Kwena, Kizito (2021-04)The study examined the adoption determinants of adapted climate smart agriculture (CSA) technologies among smallholder farmers. A multi-stage sampling procedure was used to select a total sample of 384 households. Percentages ... -
Arbuscular Mycorrhizal Fungi Colonization in the Rhizosphere of Aspilia pruliseta Schweif. ext Schweif in the Semiarid Eastern Kenya
Muchoka, James P.; Mugendi, Daniel N.; Njiruh, Nthakanio P.; Onyari, Charles N.; Mbugua, Paul K.; Njeru, Ezekiel M. (Sage, 2020-09)The use of arbuscular mycorrhizal fungi (AMF) to enhance soil phosphate uptake is a biological technique considered to cure phosphate deficiency in soils. This study investigated association of Aspilia pruliseta Schweif ... -
Comparing productivity of rice under system of rice intensification and conventional flooding: A switching regression approach
Kaloi, Francis Kadipo; Isaboke, Hezron N.; Onyari, Charles N.; Njeru, Lucy K. (Academic Journals, 2020-10)This paper examined the factors influencing rice productivity in Mwea Irrigation Scheme using the System of rice intensification (SRI) and conventional flooding (CF). Stratified sampling was used to obtain 364 smallholder ... -
Determinants Influencing the Adoption of Rice Intensification System among Smallholders in Mwea Irrigation Scheme, Kenya
Kaloi, Francis Kadipo; Isaboke, Hezron N.; Onyari, Charles N.; Njeru, Lucy K. (Hindawi, 2021-03)Rice farming has received considerable attention in developing countries and particularly in Kenya due to its impact on smallholders’ income and food security. Irrigated rice is the largest consumer of water, and its ... -
Development of a Water Quality Assessment Index for the Chania River, Kenya
Robert, G. K.; Onyari, Charles N.; Mbaka, J. G. (Taylor and Francis, 2020-11)Human-related activities are known to have deleterious effects on the water quality of aquatic ecosystems, but there is limited information on the impact of these on rivers in tropical regions, such as the Chania River ... -
Development of a Water Quality Assessment Index for the Chania River, Kenya
Kasyoka, Robert; Onyari, Charles N.; Mbaka, James G. (Taylor and Francis, 2020-11)Human-related activities are known to have deleterious effects on the water quality of aquatic ecosystems, but there is limited information on the impact of these on rivers in tropical regions, such as the Chania River ... -
Effect of on-farm testing on adoption of banana production technologies among smallholder farmers in Meru region, Kenya
Kirimi, Florence Kaumi; Onyari, Charles N.; Njeru, Lucy K.; Mogaka, Hezron N. (Emerald, 2021-08)Purpose – The purpose of this paper is to investigate the effect of on-farm testing on the adoption of banana production technologies among smallholder farmers in the Meru region, Kenya. Design/methodology/approach – The ... -
Effect of tillage method and sowing time on phenology, yield and yield components of chickpea (Cicer arietinum L.) under semi-arid conditions in Kenya
Onyari, Charles N.; Ouma, John; Kibe, A.M. (2010)Objective: To determine the phenology, dry matter yield, grain yield and yield components of chickpea under four tillage methods and three sowing times within a semi-arid area of Kenya. Methodology and results: Field ... -
Effects of Irrigation and Nitrogen Fertilizer Levels on Water and Nitrogen Use Efficiency and Yield of Drought Tolerant Hybrid Maize (Zea mays L.) in Embu County, Kenya
Onyari, Charles N. (2019)Food grain shortage in Kenya is attributed to low rainfall and poor distribution in maize growing areas particularly as well as low soil fertility associated mainly with nitrogen deficiency. Use of irrigation water and ... -
Effects of Tillage Method and Sowing Time on Growth, Water Use and Yield of Chickpea (Cicer arietinum L.) in Kenyan Dry
Onyari, Charles N. (Egerton University, 2007)The need to provide sufficient protein food for an increasing population that is mainly resource poor requires opening up of marginal land for growing appropriate pulsessuch as chickpea. An experiment was ... -
Effects of Tillage Method and Sowing Time on Growth, Water Use and Yield of Chickpea (Cicer arietinum L.) in Kenyan Dry Highlands
Onyari, Charles N. (2010)The need to provide sufficient protein food for an increasing population that is mainly resource poor requires opening up of marginal land for growing appropriate pulses such as chickpea. An experiment was carried out at ... -
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 ... -
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 ... -
Extension-Market Linkages on Banana Commercialisation Among Smallholder Farmers in Meru Region, Kenya
Kirimi, Florence K.; Onyari, Charles N.; Njeru, Lucy K.; Mogaka, Hezron R. (2022-01)The study examined the effect of extension-market linkages on banana commercialisation among smallholder farmers in the Meru region, Kenya. The study sampled 400 farmers from a target population of 288,802 from the Meru ... -
Growth Parameters of DK8031 Maize Variety as Affected by Varying Irrigation and Nitrogen Fertilizer Rates in Embu County, Kenya
Onyari, Charles N.; Kibe, Antony M.; Mwonga, Samuel (David Publishing, 2015)Determination of crop growth parameters of maize helps assess the performance of the crop for food security. A study was conducted in two seasons covering 2012 and 2013 to establish optimal irrigation and nitrogen fertilizer ... -
Influence of institutional factors on Sorghum production in Nakuru County, Kenya
Ogeto, Robert M.; Mshenga, Patience; Cheruiyot, Erick; Onyari, Charles N. (Academe Research Journals, 2012-12)Agriculture in Kenya plays an important role in development as it contributes about 24% of GDP, 75% of industrial raw materials and 60% of export earnings and about 18% of the total formal employment. It also employs about ... -
Inter-seasonal Effects on Selected Maturity Parameters of DK8031 Maize Grown under Varying Irrigation and Nitrogen Levels in Embu County, Kenya
Onyari, Charles N.; Kibe, Antony M.; Mwonga, Samuel (2017-07)Maize is a staple food and a source of carbohydrates to a large proportion of people in Kenya. The performance of crop plants such as maize depends on a number of factors such as climate, soil characteristics and plant ... -
Mycorrhiza co-association with Aspilia pruliseta Schweif. and phosphorus uptake effects on growth of gadam sorghum in the semi-arid lower Eastern Kenya
Muchoka, James; Mugendi, Daniel N.; Njiruh, Nthakanio P.; Onyari, Charles N.; Njeru, E. M. (Academic Journals, 2020-08)Mycorrhiza fungi are important components of soil microbiota in the rhizosphere and greatly influence the uptake of mineral elements by plants. A greenhouse experiment was conducted at the University of Embu to evaluate ... -
Production Functions and Their Use in Predicting Chickpea Biomass Yields When Grown under Varying Tillage and Sowing Dates in Naivasha, Kenya
Kibe, A.M.; Onyari, Charles N. (Scientific Research Publishing Co., 2007)The use of production functions as tools for analyzing agronomic relationships and crop growth is gaining importance the world over. Their predictive value in crop adaptation trials for specific agro-ecological sites ... -
Productivity of Selected Cabbage Varieties under Varying Drip Irrigation Schedules in Humic Nitisols of Embu County, Kenya
Onkoba, Stephen O.; Onyari, Charles N.; Gichimu, Bernard M. (Hindawi, 2021-05)Use of controlled irrigation in vegetable production is considered a viable option for optimizing input use and productivity. %is study aimed at assessing the effects of different drip irrigation schedules on productivity ...