Welcome to the International Institute of Tropical Agriculture Research Repository
Conference Documents: Recent submissions
Now showing items 361-380 of 726
-
Amelioration de la production de ligname a travers la fertilisation minerale en zone de savene de Cote dIvoire
(2003)Improving yam production by mineral fertilisation in the savanna zone of Cote d'Ivoire. Côte d'Ivoire is the second producer of yam after Nigeria with 2.8 millions tons produced per year. Though its farmers are still looking for ‘'virgin'' soil to increase their yields. Mineral fertilization study led in the savanna zone has as objective to determine the response of local yams to mineral fertilizers. Thus, four local varieties (Bètè bètè, Gnan, Krenglè and Wacrou) are tested with two fertility ... -
Increasing biological N2 fixation and its contribution to the N cycle in alley cropping
(1995)Biological N2 fixation (BNF) of hedgerow trees, organic mailer decomposition and nutrient transfer to associated food Crops are the major processes which should actualize the expected benefits of alley cropping systems. Leucaena leucocephala or Gliricid,a sepium can fix between 134 and 274 kg N2 ha-1 yr-1 under field conditions. There are large genotypic and microbial symbiont differences between varieties of a single tree species resulting in different N2 fixation, and differences in tolerance ... -
The role of Vesiculararbuscular mycorrhizal (VAM) fungi in alley cropping
(1995)Alley cropping trials were conducted on different parts (top, middle and base) of a sloping land to compare the effects of inoculation with vesicular-arbuscular mycorrhizal (VAM) fungi on Senna siamea, Gliricidia sepium and Leucaena leucocephala and cassava (Manihot esculenta Crantz) intercrop on an Alfisol in subhumid southwestern Nigeria. The above ground biomass yield of hedgerow trees one year after establishment was higher at the base than at the top of the slope, bur was not influenced by ... -
Exante evaluation of nutrition and health benefits of biofortified cassava roots in nigeria: the dalys approach
(2004)Cassava is a major staple that supplies more than 50% of daily energy to more than 200 million persons in sub-Saharan Africa (SSA). Cassava roots are known to be low in micronutrients such as vitamin A, iron, and zinc. Micronutrient deficiencies threaten the lives of millions of poor households and those located in remote rural areas of SSA often not targeted by fortification programmes. This paper presents results from an ex-ante evaluation of nutrition and health benefits of increased vitamin A ... -
Future of plant virus disease research in subSaharan African agriculture
(2003)In sub-Saharan Africa (SSA), many crops grown by subsistence farmers are severely affected by virus diseases. These diseases are distinct from each other and have various means of spread and perennation. Many are widely distributed in the region. The causal agents of several virus diseases have been characterized and diagnostic methods developed. Crop varieties with acceptable levels of resistance are being developed for some of these diseases. However, this information and the materials are often ... -
Population density and distance to market does not influence the farmers use of organic manure.
(2008)This study developed and employed a socio-economic-ecological-modeling (SEEM) framework in its analyses. The SEEM is made up of four resource use domains of highlow population density and highlow access to market and two agro-ecologies in the savanna of Nigeria. Data used comprises a sample of 320 farm households in northern Nigeria. The pattern of organic manure use varied slightly and insignificantly across agro-ecological and resource use domains. The major finding of the study is that the ... -
Beauveria bassiana as an artificial endophyte in tissuecultured banana (Musa spp.) plants: a novel way to combat the banana weevil Cosmopolites sordidus
(2008)Beauveria bassiana, which is effective against a variety of insect pests, is the most researched and commercialised fungal biopesticide. Laboratory and screenhouse studies have revealed great potential of this entomopathogenic fungus for use against the banana weevil, Cosmopolites sordidus, in banana. However, impractical field delivery methods and high costs associated with the application of B. bassiana against C. sordidus prevent its use and commercialisation in banana fields. Our research has ... -
Effectiveness of breeding and disseminating CMDresistant cassava varieties in western Kenya
(2005)In 1996, Cassava Mosaic Disease in Western Kenya depressed productivity and de-stabilized markets. The study assesses the effectiveness of breeding and disseminating CMD-resistant varieties in western Kenya by determining the extent of adoption and impact on farmers' income of the new varieties vis-àvis the level of investment in the program as well as the factors that influenced their adoption. Results show that the new varieties significantly increased production and marketing potential of cassava ...