Now showing items 1-20 of 95

    • Performance of DSSAT model for the simulation of millet (Pennisetum glaucum [L.] R.Br) growth and yield in Niger 

      Bakasso, A.M. (University of Parakou, 2022-11)
      Résumé Le mil (Pennisetum glaucum (L.) R. Br.) représente la principale céréale la plus utilisée et cultivée au Niger. Néanmoins, une baisse de production qui est due à plusieurs facteurs dont la pauvreté des sols et une inégale répartition de pluie dans le temps et dans l’espace. Cette dernière se traduit par un retard au niveau des installations des campagnes agricoles. Le choix de la date de semis et des variétés appropriées reste l’une des options pour faire face à ce problème. Cette étude a ...
    • Productivity of cowpea genotype under maize intercropping system in the northern and southern Guinea Savanna of Nigeria 

      Bukar, M.A. (Bayero University Kano, 2020-02)
      A field experiment was conducted in 2018 rainy season at the International Institute of Agriculture Research Farms at Abuja and Zaria to know the adaptability of cowpea genotype to maize canopy in northern and southern Guinea savannah of Nigeria. The experiment consisted of 12 treatment combinations; of three cowpea varieties (SAMPEA 11, SAMPEA 14, and UAM09-126-19-2) in two cropping systems (sole and intercropped with EVDT99) and at two relay dates (5 and 8 WAS). The treatments were laid out in ...
    • Quantifying leaf litter production, decomposition, and nutrient release in cacao plantations in southwest Nigeria 

      Oyedele, O. (University of Ibadan, 2021-10)
      Nutrient cycled from litterfall plays an important role in sustaining the fertility status in cacao (Theobroma cacao L.) plantations. However, the role of macrofauna in regulating the rate of decomposition and nutrient release remains uncertain despite its importance in litter decomposition and nutrient release. The study was carried out to assess the quantity and seasonal pattern of annual litterfall production in low-shade cacao plantations found in Southwestern Nigeria and also to determine the ...
    • Studies for improving pollination and fertilization efficiency in East African Highland Matooke and Mchare Bananas (Musa spp.) 

      Waniale, A. (Makerere University, 2022-03)
      Matooke and Mchare are two distinct subgroups of East African bananas (EABs) (Musa spp.) that are endemic to the Great Lakes region of East Africa. In this region, they are pivotal in for food and income security of more than 70 million people. However, productivity of these EABs is significantly constrained by pests and diseases that reduce the yield and directly affecting the livelihoods of banana farming communities in the region. While cultural methods of disease and pest control are widely ...
    • Validation of single nucleotide polymorphism makers associated with cassava mosaic disease resistance in a clonal evaluation trial 

      Ishimwe, Y. (University of Ibadan, 2019-09)
      Cassava is an important staple crop in Africa for almost half of the population. The main biotic constraint of the crop is Cassava Mosaic Disease (CMD) which causes significant losses on farmers’ field. The conventional screening for CMD resistance in new cassava populations is time-consuming, expensive and not highly reliable. However, there are newly developed Single Nucleotide Polymorphism (SNP) markers linked to CMD resistance which have not been validated. Therefore, the objective of this ...
    • Response of cocoa (Theobroma cacao L.) seedlings to folia fertilizer application and fertigation 

      Yeboah, S. (Kwame Nkrumah University of Science and Technology, 2023-03)
      The production of quality and vigorous seedlings is important for sustainable cocoa production. A greenhouse nursery study was conducted in 2019/2020 at CRIG to assess the effects of foliar fertilizer application and fertigation on soil chemical properties, nutrient uptake and growth of cocoa seedlings. The study was 4x3 factorial experiment, laid out in completely randomized design with 13 treatments and three replicates. Two liquid fertilizers (NPK 24:17:18 and NPK 10:10:10) and two granular ...
    • Assessing nitrogen flows and greenhouse gas emissions in low input cropping systems of Lake Victoria Basin 

      Winnie, N. (Kenyatta University, 2022-10)
      Too little nitrogen (N) is a threat to cropping systems and soil fertility in sub-Saharan Africa (SSA). Nitrogen budgets (NB) and nitrogen use efficiency (NUE) are critical tools for assessing N dynamics in agriculture and have received little or no attention in the region. The study aimed to assess key N performance indicators at field and farm level based on N use scenarios and help to inform policy on formulating relevant decision and practices to enhance N management for improved crop productivity ...
    • Effects of potassium and magnesium on cassava vegetative and root yield 

      Sanginga, A.D. (University of Eldoret, 2022-10)
      Cassava (Manihot esculentum) has a high potassium (K) demand and its application does not generally increase yields. Potassium may have antagonistic effects on magnesium (Mg) leading to deficiency of Mg in the soil. The objectives of this study were to (I) evaluate the vegetative growth of cassava under different K and Mg fertilizer combinations and (ii) determine the effects of K and Mg fertilizer on cassava storage root yield. A 2-cropping season experiment was conducted in a randomized complete ...
    • Assessing the potential of the ECMWF-S5 satellite-based seasonal rainfall forecasts for improved crop farming in Ghana 

      Kwabena, O. (Kwame Nkrumah University of Science and Technology, 2022-09)
      Forecasts of seasonal rainfall are important for the agricultural sector, particularly in nations where rain-fed agriculture is predominant. A robust agricultural system is made possible by the ability to predict seasonal rainfall with accuracy and precision. Due to the limited and sparse availability of gauge data, both satellite-based and model seasonal rainfall forecasts are beneficial for predicting seasonal rainfall. While seasonal rainfall forecasts based on models and satellites complement ...
    • Bias correction of daily chirps-V2 rainfall estimates in Ghana 

      Johnson, R. (Kwame Nkrumah University of Science and Technology, 2022-10)
      A wide range of economic sectors in the Ghana, including agriculture, health care, and energy, heavily rely on climate data; as a result, having access to reliable climate data is crucial for research and economic growth yet rainfall gauge data in Ghana scarcely available, therefore, researchers tend to depend on satellite estimates for hydrological studies and impact assessments. However, biases in satellite rainfall estimates and the ability for these rainfall products to effectively capture ...
    • Impact and adoption of drought tolerant maize varieties and interrelated agricultural technologies on rural households productivity and welfare 

      Oyetunde-Usman, Z. (University of Greeenwich, 2021)
      Over the years, climatic variations have persistently induced technological interventions in developing countries and were strategic in varietal development and modification of agronomical practices in developing countries. In addition, there are overwhelming records of impact on productivity and welfare of rural farm households. Despite these efforts, low adoption continues to be a huge problem and a clog to meeting sustainable agricultural development goals. This research contributes to the large ...
    • Adoption et perception des producteurs Nigeriens face aux changements climatiques et l'utilisation des varietes ameliorees 

      Issoufou, M.H. (Institut de Strategie D'evaluation et de Prospective, 2021)
      L’agriculture Nigérienne fait face à une faible production agricole car étant une agriculture pluviale à faible rendement, et l’élevage, un élevage extensif tributaire des ressources naturelles. IL est de plus en plus admis que le réchauffement planétaire actuel ne peut être évité (IPCC, 2007). Le recours à l’adoption des technologies agricoles améliorées s’est avéré indispensable pour une augmentation de la production agricole dans le but d’améliorer le bien-être des producteurs. Ainsi, dans notre ...
    • Physicochemical parameters and functional properties of flours from advanced genotypes and improved cassava varieties for industrial applications 

      Chimphepo, L. (University of Malawi, 2021-08)
      Cassava has potential for many industrial uses, which provide an opportunity for more rewarding markets. Therefore, significant research on improved varieties, targeting industrial applications, is required as a possible approach to spur improvements in the value chain. In addition, the promotion of cassava for production, targeting industrial applications, requires information on yield and stability performance of cassava genotypes and varieties in a diverse range of environments. To this end, ...
    • Development of a multi-layer gene regulatory network perturbation simulation model for host-pathogen interaction studies 

      Olagunju, T.A. (University of Ibadan, 2021-12)
      Gene Regulatory Networks (GRNs) modulate the traits of an organism. Perturbation experiments which were employed to identify Trait-influencing Genes (TGs) are limited to only a few genes at once, and inadequate to identify the TGs of complex traits like disease resistance. Network modelling techniques for complex systems such as GRNs can provide a holistic system view to overcome the limitation of identifying TGs of complex traits with perturbation experiments when applied to genome-wide Next ...
    • Genome-wide association mapping and stability analysis of root mealiness in cassava (Manihot esculenta Crantz) 

      Uchendu, U.K. (University of Ghana, 2020-12)
      Cassava breeders have made significant progress in developing new genotypes with improved agronomic characteristics such as improved root yield. However, these new and improved cassava genotypes in cultivation in Nigeria have undergone little or no improvement in their culinary qualities; hence, there is a paucity of information on the texture of boiled cassava roots, particularly with regard to its mealiness. The objectives of this study were to: (i) elicit farmers’ knowledge, perceptions and ...
    • Effects of agroforestry and climate on cocoa yield, pests and diseases 

      Asitoakor, B.K. (University of Ghana, 2021-06)
      Cocoa (Theobroma cacao) originates from the Amazon basin in South America. The crop is cultivated across many tropical regions, with the largest production from West Africa, where Ghana and Cote d’Ivoire contribute 70% of global production. Two major systems dominate cocoa production; a full-sun monocropping system where the cocoa crop is grown without shade trees, and an agroforestry system where cocoa is grown with deliberately planted or retained forest/fruit trees. Aside soil fertility and ...
    • Rapid detection of adulterated fermented maize (Ogi) with sorghum leaf sheath (Poroporo) using visible-near infrared spectroscopy 

      Onifade, J.O. (University of Ibadan, 2022-03)
      Food adulteration is a very old and common problem, which is often seen in both the low-and middle-income countries and even in some developed countries. Maize-based porridge especially ogi is a high-value commodity and common indigenous complementary food that is a target for adulteration, leading to loss of quality and encroachment on the rights and interests of consumers. This study investigated the characterization of the microorganisms found in ogi fermented for 0 to 120 hours and the feasibility ...
    • Inheritance patterns and genome-wide association study of tropical early-maturing maize inbred lines under striga infestation and drought stress environments 

      Adewale, S.A. (Obafemi Awolowo University, 2021)
      This study determined the gene action controlling grain yield and other agronomic traits among newly-developed early-maturing maize inbred lines under drought stress, Striga infestation, optimal conditions and across research environments; examined the combining ability of the early maize inbred lines under each and across research environments; classified the inbred lines into heterotic groups using DArTseq (Diversity Arrays Technology sequencing) markers and combining ability effects methods and ...
    • Effective communication for disseminating soil and water management practices to bring about sustainable smallholder agriculture in Tanzania: case study of Manyara and Dodoma regions 

      Ndibalema, G. (Wageningen University and Research Center, 2019-05)
      This study investigated effective communication for disseminating soil and water management (SWM) practices for sustainable smallholder agriculture. Higher uncertainties in precipitation and land degradation are potentially the most limiting reasons for poor performance of rainfed agricultural sectors in Tanzania. Despite the increased focus on sustainable intensification of African agriculture and an increase of agricultural innovations with potential to alleviate these, adoption by smallholder ...