Effect of date of sowing on beanfly infestation of the bean crop

The effect of planting dates on beanfly infestation was investigated in successively planted bean plants during cropping seasons. The population tended to build up in the course of the season following the initial invasion by egg-laying females. Ophiomyia spencerella (Greathead) and Ophiomyia phaseoli (Tryon) were the species of beanflies infesting the bean plants in all seasons. The number of beanfly leaf punctures, eggs, larvae and puparia were more in late planted than early planted bean crop.

Prevalence of cryptosporidiosis in dairy cattle, cattle-keeping families, their non-cattle-keeping neighbours and HIV-positive

This paper reports a study estimating the prevalence of cryptosporidiosis, an emerging zoonosis, in people and cattle in Dagoretti, Nairobi. A repeated cross-sectional survey was carried out among randomly selected cattle keepers in Dagoretti, their dairy cattle

Effect of clump planting of maize and time of planting of beans on growth and yield of intercropped maize and beans

Two field experiments were conducted at the University of Nairobi's Faculty of Agriculture Kabete, to investigate the merits of clump planting of maize and time of planting of intercropped beans on growth and yield of the maize and beans. Effect of the treatments on field weed load was also examined. Three clumping patterns of maize and three planting times of beans were tested in a factorial experiment laid out in a completely randomised block design with three replications.

Some implications of population growth and maize production in Kenya (1980-2000)

The aim of this study is to investigate the relationship between the demand for maize and its production in the period 1980 to 2000. For this reason, population projections were calculated for a period 1980-2000 to estimate demand for maize for the period under consideration. Some assumptions are made regarding fertility and mortality trends as ~el1 as area and yield of land under maize cultivation.
Recommendations will be suggested to ensure enough maize for the population in the future.

An agronomic evaluation of potato/maize and potato/beans intercrops

The yields of a potato/maize and potato/bean intercrops, in which the maize and bean planting patterns were modified, were evaluated in the short and long rainy seasons of 1984-85 respectively. The study included two potato clones, CIP 720084, an advanced clone from the International Potato Centre (CIP) and variety B53, a commercial variety in Kenya. Land equivalent ratio (LER) was used to assess the efficiency of land use in these intercrops. In the short rafuy season, CIP 720084/maize intercrop gave the highest LER of 1.34 whereas B53/maize intercrop gave the lowest LER of 1.06.

Mixed cropping of maize and beans in Kenya: results of the bean general culture trials in 1975 and 1976.

In 4 trials in 1975-6, beans [Phaseolus vulgaris] intercropped with maize did not decrease maize grain yields significantly compared with pure stands at sites in W. Kenya, but in 1 of 3 trials in E. Kenya intercropped maize yields showed some decrease. When beans were intersown at the same time as maize, mixed cropping showed an advantage in land use over pure stands, with relative yield totals (RYT) of 1.22-1.78 in W. Kenya and 1.06-1.25 in E. Kenya. Seed yields of intercropped beans were 14-73% of those of pure stands. Sowing beans > 1 wk after maize greatly decreased bean yields.

Fertilizer Trial Results Of Maize And Maize-bean Intercrop Trials In Kenya

Fertilizer trial studies were conducted in all major crop producing agro-ecological zones (AEZs) of Kenya. The aim of the study was to establish reliable and current response curves for major food crops to applied nitrogen and phosphorus. The experimental sites of 0.5 ha were located in various AEZs. The experiment considered N and P205 at four levels each (0, 25, 50 and 75 kg/ha). Maize, Kenya's main food crop, was tested in pure stand and intercropped with beans. The study shows that intercropped beans affected maize yields differently in different environments.

Effect of fertilizer input subsidy on maize production in Kenya

Maize is a staple food in Kenya, consumed in various forms by 96 percent of the population. Its’
production is characterized by high smallholder participation which contributes about 75% of the
overall production, with the remaining 25% being contributed by the large-scale farmers. The
high level production of maize and its development has a positive impact on rural incomes,
poverty reduction and food security. Maize growing in Kenya is concentrated in the Rift Valley

Household dietary exposure to aflatoxins from maize and maize products in Kenya

Aflatoxicosis has repeatedly affected Kenyans, particularly in the eastern region, due to consumption of contaminated maize. However, save for the cases of acute toxicity, the levels of sub-lethal exposure have not been adequately assessed. It is believed that this type of exposure does exist even during the seasons when acute toxicity does not occur. This study, therefore, was designed to assess the exposure of households to aflatoxins through consumption of maize and maize products.

Climate variability and livestock feeding strategies in the agro-pastoral systems of Southeastern Kenya

This study was conducted to address the problem of inadequate information on the characteristics of drylands' agro-pastoral livestock production systems and how they are adapting to the changing environments (biophysical, social, cultural, economic and technological) under increasing climate variability.


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