Determination of combining abilities for grain yield and grey leaf spot resistance among selected maize inbred lines

Maize is a staple food crop for about 90% of Kenyans. Its production by smallholder farmers often plays a vital role in food security and alleviating poverty. Grey Leaf Spot (GLS) caused by Cercospora zeae maydis significantly reduces maize yields in farmers' fields. This study was carried out at three sites (KARI-Kiboko, Kabete Field Station and KARI-Kakamega) in 2006 to determine the combining abilities for yield. (j·LS resistance and other traits among seven selected maize inbred Iines CIVIL:204, CML 312. CML 373, CML 384, TZfv1I 102. TZMI 711 and TZIVII 712.

Comparative efficiency of tillage practices in maize

Weed management practices used by small scale farmers determine maize productivity. The trials were executed in Kigumo district during the long and short rains in 2010 to compare effectiveness of glyphosate and hand weeding on weed management in maize (Zea mays L.). Treatments were arranged in a Completely Randomized Complete Block Design replicated three times in a split plot arrangement. The main plots were two maize varieties DUMA SC41 and DK8031 and the subplots three weed management practices,(glyphosate, hand weeding and no tillage).

Preparation of weaning porridges from blends of cereals and sweetpotato flours

The main objective of this study was to produce a food for infants and children that is nutritious, low in bulk and high in energy content, from blends of cereal and sweetpotato flours. Cured sweetpotatoes from two varieties containing high levels of endogenous amylolytic enzymes and B-carotene were prepared and dried as slices then milled into flour. The flour was blended with maize and millet flours.

Socio-economic factors influencing adoption of improved maize storage systems in Bungoma District, Kenya

Post-harvest facilities or appropriate storage technology has been the major problem of Kenyan agricultural sector and has resulted in inconsiderable waste of agricultural output and great loss to the economy. The purpose of this study was to determine socio-economic factors influencing adoption of improved maize storage systems in Bungoma District.

Investigation of mutagenicity of solar disinfected (SODIS) water stored in plastic bottles

Waterborne illnesses associated with poor sanitation are a major problem in Africa’s major slum, Kibera. Microbiologically the Solar Disinfected (SODIS) water is safe but the potential mutagenicity of such water is of great concern. When water contained in polyethylene terephthalate bottles is treated using solar, the additives (plasticizers) in the plastic bottle may easily hydrolyze, photochemically degrade and leach into the disinfected water in minute quantities that may be responsible for mutagenicity.

Investigating the mechanical properties of glass reinforced polymer as material for solar hot water tanks in coastal areas

Abstract: Over the years solar water heater storage tanks have been made of galvanized steel or coated with enamel to prevent rusting due to corrosion. Current designs and fabrications of solar heater storage tanks do not last long due to corrosion of the tanks accelerated by high temperatures and saline water they handle at the coastal regions. The objective of this research was to investigate the performance of Glass Reinforced Plastic as a material for the tanks in the saline coastal waters.

Effect of tillage equipment on maize production a model for semiarid small holder agriculture

The main problem addressed in this thesis is inadequate utilization of farm equipment for conservation tillage in maize production. This problem is manifested in the form of inadequate soil loosening, low application of organic fertilizers, late planting and weeding. These are some of the main causes of low maize yield estimated at one tonne per ha, which is less than half the potential after adoption of available package of recommended practices.

The response of maize - pigeonpea Intercrop to nitrogen and phosphate Fertilizers

Two experiments were conducted during the short rainy season of October 1989 to April 1990to study the effect of nitrogen and phosphate fertilizer application on the intercrops of maize and pigeon pea on their growth, yield and yield components. One experiment was sited at the Field Station of Faculty of Agriculture, Kabete and the other at Machakos Farmers Training Centre, Machakos.

Leaf area development, dry weight accumulation and solar energy conversion efficiencies of Phaseolus vulgaris L. under different soil moisture levels near Nairobi, Kenya.

Leaf area development, dry weight accumulation and solar energy conversion efficiencies of Phaseolus vulgaris cv. GLP-2 were investigated under two soil moisture levels in two contrasting seasons near Nairobi, Kenya. The experiment confirms that dry weights and yields of Phaseolus vulgaris are limited by a drought induced decrease in leaf area, leading to less radiation interception as a source for assimilation. However, photosynthetic efficiency in Phaseolus vulgaris decreased and contributed to these effects.

Alley cropping of maize with calliandra and leucaena in the subhumid highlands of Kenya: Part 2. Soil-fertility changes and maize yield

Although N-rich leaf biomass of multipurpose trees is known to be a good source of N to crops, integrating such trees into crop production systems is a major challenge in the development of viable agroforestry systems. An approach to integrating calliandra (Calliandra calothyrsus Meissner) and leucaena (Leucaena leucocephala (Lam.) de Wit), two promising agroforestry tree species, into maize (Zea mays L.) production system was investigated in the subhumid highlands of central Kenya during four maize-growing seasons from 1994 to 1996.

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