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Browsing Journal of Agriculture, Science and Technology by Issue Date

Browsing Journal of Agriculture, Science and Technology by Issue Date

Now showing items 1-20 of 199

A RAPID METHOD BASED ON UV SPECTROPHOTOMETRY FOR QUANTITATIVE DETERMINATION OF ALLICIN IN AQUEOUS GARLIC EXTRACTS

Wanyika, H. N.; Gachanja, A. N.; Kenji, G. M.; Keriko, J. M.; Mwangi, A. N. (JKUAT, 2016-09-04)

Garlic (Allium sativum) is known for its medicinal and health food use. However, garlic extracts are also used in bio-pesticides. This study reports research on the optimisation of a fast and cheap method for assaying ...
A prototype parabolic trough solar concentrators for steam production

Kawira, M.; Kinyua, R.; Kamau, J. N. (JKUAT, 2016-10-04)

In this work, the potential for a solar-thermal concentrator to produce steam has been studied. Three parabolic trough solar concentrators (PTSCs) of dimensions: - aperture width of 1.2 m, Collector length of 5.8 m and ...
A new third order rotatable design in five dimensions Through balanced incomplete block designs

Koske, J. K.; M. K. Kosgei; Mutiso, J. M. (JKUAT, 2016-10-04)

Response surface methodology (RSM) is a collection of statistical and mathematical techniques useful for developing, improving and optimising processes. To cut on costs, an experimenter has to make a choice of the ...
A geo-electrical resistivity conceptual model update for the Menengai geothermal system

Saitet, D. S.; K’Orowe, M. O.; Mariita, N. O. (JKUAT, 2016-10-04)

A geo‐electrical conceptual model for the Menengai geothermal prospect is built using magnetotellurics data both of low and high amplitude collected over time. The data is corrected for static shift by use of transient ...
An aspergillus isolate and its secondary metabolites from lake Elementaita in Kenya

Ndwigah, F. I.; Boga, I. H.; Wanyoike, W.; Kachiuri, R. (JKUAT, 2016-10-04)

The soda lakes provide a high biodiversity of halophilic and alkaliphilic fungi. The fungus in this study was isolated from sediments collected from Lake Elmentaita in Kenya. The effect of pH and sodium chloride on growth ...
An improved perturb and observe maximum power point tracking Technique using fuzzy logic controller

Kisame, E. A.; Gatari, M. J.; Mulati, D. M.; Lavi, M. (JKUAT, 2016-10-04)

In this work, an improved microcontroller-based maximum power point tracking algorithm for PV solar charge controller is proposed and implemented. The proposed algorithm uses fuzzy logic controller to adaptively modify ...
A comparison of spatial rainfall estimation techniques: a case study of Nyando river basin Kenya

Mutua, F. (JKUAT, 2016-10-04)

Many hydrological models for watershed management and planning require rainfall as an input in a continuous format. This study analyzed four different rainfall interpolation techniques in Nyando river basin, Kenya. ...
Analysis of the convective heat transfer of a fluid flow over an Immersed axi-symmetrical body with curved surfaces

Kinyanjui, M. N.; Kioi, D. G.; Kwanza, J. K. (JKUAT, 2016-10-04)

Convective heat transfer in a homogeneous fluid flow Reynolds number of order less than 2000 over an immersed axi-symmetrical body with curved surfaces has been investigated. The fluid flow in consideration was unsteady ...
An investigation of the utility scale wind energy for north-eastern Kenya region

Kamau, J. N.; Kinyua, R.; Gathua, J. K. (JKUAT, 2016-10-04)

In the present study, the wind energy potential for Garissa (0o28’S, 39o38’E) and Marsabit (2o 19’N, 37o 58’E), both rural towns in north-eastern Kenya have been statistically analyzed on a 6-year measured hourly time ...
ASSESSMENT OF COMPLIANCE TO SELECTED SECTIONS OF OCCUPATIONAL SAFETY AND HEALTH ACT 2007 AND SUBSIDIARY LEGISLATION AT KENYA TEA DEVELOPMENT AGENCY REGION FIVE FACTORIES

Kimeto, S. K.; Kiiyukia, C.; Makhonge, P. (JKUAT, 2016-10-04)

The tea industry is the largest employer in the private sector, with over 80,000 working in the estate and 3 million earning their livelihoods from the sector (KTDA annual report, 2003) The main risks posed to workers ...
ASSESSMENT OF POLLUTION IN NDARUGU RIVER DUE TO RUNOFF AND AGROINDUSTRIAL WASTEWATER DISPOSAL

Hadgu, L. T.; Nyadawa, M. O.; Mwangi, J. K.; Kibetu, P. M. (JKUAT, 2016-10-05)

River Ndarugu is a tributary of Athi River in Kenya and is one of the main sources of fresh water for domestic use to the villages along the river bank and Nairobi City. It traverses Juja Township in Kiambu County, Central ...
ASSESSMENT OF PESTICIDE USE AND APPLICATION PRACTICES IN TOMATO BASED AGROSYSTEMS IN KALILUNI SUB LOCATION, KATHIANI DISTRICT, KENYA

Mutuku, M.; Njogu, P.; Nyagah, G. (JKUAT, 2016-10-05)

Pesticides are of great benefit to agriculture in Kenya by decreasing crop losses due to insects, weeds, plant diseases, rodents and other pests. They also save lives through control of disease carrying insects and ...
ASSESSMENT OF FIRE SAFETY PREPAREDNESS AT JOMO KENYATTA INTERNATIONAL AIRPORT

Wambugu, F.; Mburu, C.; Gatebe, E. (JKUAT, 2016-10-05)

Recently, Kenyans have witnessed an increase in incidents of fire where fire has gutting down homes, buildings and factories, with loss of lives and property. Lack of disaster preparedness has remained one of Kenya’s ...
ASSESSING APPLICATION OF MARKOV CHAIN ANALYSIS IN PREDICTING LAND COVER CHANGE

Mubea, K. W.; Ngigi, T. G.; Mundia, C. N. (JKUAT, 2016-10-05)

Land use/cover change is a major global environmental change issue and projecting these changes is essential for the assessment of environmental impacts. In this study, a combined use of satellite remote sensing, geographic ...
APPLICATION OF THE GEOLOGICAL STREAMFLOW AND MUSKINGUM CUNGE MODELS IN THE YALA RIVER BASIN, KENYA

Kiluva, V. M.; Mutua, F.; Makhanu, S. K.; Ong’or, B. T. I. (JKUAT, 2016-10-05)

The nature of surface runoff and its effects in the watershed can be represented by the application of hydrologic and hydraulic models. In this study, the Geological Streamflow Model (GeoSFM) and the Muskingum Cunge (M-C) ...
APPLICATION OF STOCHASTIC FRONTIER APPROACH MODEL TO ASSESS TECHNICAL EFFICIENCY IN KENYA’S MAIZE PRODUCTION

Kibaara, B. W.; Kavoi, M. M. (JKUAT, 2016-10-05)

Kenya realised tremendous growth in maize production between 1964 and 1997, fueled by the introduction of high yielding hybrid maize. However, from 1997, there has been a decline in yield from 1.85 to 1.57 metric tones ...
APPLICATION OF EULER DECONVOLUTION TECHNIQUE IN DETERMINING DEPTHS TO MAGNETIC STRUCTURES IN MAGADI AREA, SOUTHERN KENYA RIFT

Githiri, J. G.; Patel, J. P.; Barongo, J. O.; Karanja, P. K. (JKUAT, 2016-10-05)

Magadi area is located in the southern part of the Kenyan rift, an active continental rift that is part of the East African Rift system. Thermal manifestations in the form of hot springs in the northern and southern shores ...
ANALYSIS OF THE CONVECTIVE HEAT TRANSFER OF A FLUID FLOW OVER AN IMMERSED AXI-SYMMETRICAL BODY WITH CURVED SURFACES

Kinyanjui, M. N.; Kioi, D. G.; Kwanza, J. K. (JKUAT, 2016-10-05)

Convective heat transfer in a homogeneous fluid flow Reynolds number of order less than 2000 over an immersed axi-symmetrical body with curved surfaces has been investigated. The fluid flow in consideration was unsteady ...
AN INVESTIGATION OF THE STRUCTURE BENEATH MAGADI AREA IN SOUTHERN KENYA RIFT USING GRAVIMETRIC DATA

Githiri, J. G.; Patel, J. P.; Barongo, J. O.; Karanja, P. K. (JKUAT, 2016-10-05)

Magadi area is located in the southern part of the Kenyan rift, an active continental rift that is part of the East African Rift system. Local seismic activity monitored previously around Lake Magadi revealed an earthquake ...
ASSESSMENT OF SELECTED NATIVE PLANTS GROWING ALONG NAIROBI RIVER FOR UPTAKE OF COPPER, ZINC AND CADMIUM

Orwa, T O; Kiptoo, J.; Onditi, A.; Njogu, P M (JKUAT, 2016-10-05)

Nairobi River has high quantities of heavy metals emanating mainly from industrial and domestic wastes. Phytoremediation is a promising alternative to conventional clean-up methods; however, not enough information is ...

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