Recent Submissions

  • Improvements to cassava-maize intercropping systems in southern Nigeria 

    Nwokoro, C.C. (ETH Zurich, 2021)
    Cassava-maize intercrop is a traditional and the most popular cassava-based cropping system in southern Nigeria where farmers allocate > 60% of their farmland to intercropping in a typical cropping season. Besides that the system is ecologically adapted to the region, it facilitates a quick recovery from food and cash shortages at planting seasons caused by seed and cash investments in farming operations in every cropping season, .i.e., through food and income generated from maize harvest ~ 3 to ...
  • Morphological and molecular assessment of genetic diversity in some yam (dioscorea species) landreaces 

    Alarape, S.A. (University of Ibadan, 2021-04)
    Yam (Dioscorea species) consist of about 600 species with only 6 species mostly used as food yam. New landraces have been cultivated across Sub-Saharan Africa with little or no information on their identities. However, information on these landraces will serve as a genetic tool for crop improvement. This study assesses the morphological and molecular characterisation of the newly collected yam landraces for genetic diversity.One hundred accessions, comprising Dioscorea rotundata (83), Dioscorea ...
  • Production et valorisation des larves de mouche soldat noire, Hermetia illucens (Diptera : Stratiomydae) 

    Dzepe Togue, D.R. (University of Dschang, 2021-06)
    La mouche soldat noire (MSN), Hermetia illucens est un insecte à métamorphose complète qui durant son stade larvaire s’alimente avec voracité sur divers types de substrats organiques tout en convertissant les composés azotés et les hydrates de carbones en biomasses larvaires hautement riches en protéines et en lipides alimentaires. Cette étude avait pour objectif d’élucider les processus biologiques clés qui ont lieux durant son cycle de développement et leurs applicabilités dans le recyclage des ...
  • Planting time of cowpea living mulch effect on soil moisture fluxes and maize growth in the northern region Ghana 

    Annan, E. (University of Ghana, 2020-11)
    The Northern Region of Ghana is vulnerable to weather variability especially uneven rainfall distribution patterns. This compromises soil moisture availability for optimal crop growth. The objective of this study was to assess the effect of cowpea living mulch as a soil and water conservation measure on soil moisture fluxes and maize growth in the Northern Region of Ghana. Four different maize-cowpea intercrop systems were combined with three maize varieties in four different communities and their ...
  • Investigation of systemic movement patterns of Cassava Brown Streak ipomoviruses in selected cassava varieties 

    Ceasar, G. (University of Dar es Salaam, 2019-06)
    Cassava is among the important food security crops in Sub Saharan Africa and a major staple food for more than 800 million people in the developing world. Cassava production in Africa which is more than half of the total world production is affected by viral diseases, one being Cassava Brown Streak Disease (CBSD) caused by two distinct species of Ipomoviruses namely; cassava brown streak virus and Ugandan cassava brown streak virus collectively called cassava brown streak ipomoviruses (CBSIs). ...
  • Identification of end-users' preferences of a cassava product ("Gari") in Benue and Osun State, Nigeria 

    Osunbade, O.A. (Ladoke Akintola University of Technology, 2020-03)
    Breeding of improved cassava varieties has been concentrated on preferred characteristics by the farmers to the detriment of attributes preferred by other end-users which made the final product not generally acceptable by all the end users. This study aimed at identifying the preferred quality characteristics of gari/eba among farmers, processors, traders and consumers to help breeders to develop new improved cassava varieties that will meet the quality characteristics of good gari as preferred ...
  • Effect of fertilizer combinations on soil chemical properties, growth and yield of cassava (Manihot esculenta Crantz) in Ogun State 

    Oyebade, B.A. (Federal University of Agriculture Abeokuta, 2021-05)
    Cassava (Manihot esculenta Crantz) is a heavy feeder crop that exploits large volume of soil for nutrients, hence the continuous cultivation of cassava result in nutrient depletion, unless adequate fertilizer input such as inorganic fertilizer is used. This necessitated testing the effect of eleven different fertilizer types: Control (no fertilizer), recommended rate of nitrogen (N), phosphorus (P), potassium (K), half recommended rate of N, P, K, NPK + Micro-nutrients, NP, NK, PK, half N + P, K, ...
  • Physiological evaluation of soybean (Glycine max (L.) Merr.) varieties as influenced by inoculation and sowing date in the Guinea Savanna 

    Aminu, A.S. (Ahmadu Bello University, 2019-12)
    A field trial was conducted during the 2018 Rainy Season at the Research Field of International Institute of Tropical Agriculture, University farm of Ahmadu Bello University, Zaria at Samaru in the Northern Guinea Savanna and International Institute of Tropical Agriculture Research farm, Kubwa Abuja in the Southern Guinea Savanna of Nigeria. The treatments consisted of four varieties of soybean (TGx 1904-6F, TGx 1951-3F, TGx 1955-4F and Sambaiba), two sowing dates (late June and early July) and ...
  • Predicting biochar production and carbon sequestration for soil productivity in eastern Uganda 

    Nakubulwa, D. (Makerere University, 2019-12)
    Biochar, a product of biomass gasification is used to sequester carbon in soils for long periods of time and intensification of agricultural productivity. Crop residues are an important source of biomass for biochar production but availability in smallholder farming systems across Sub Saharan Africa (SSA) is unknown due to the cost and labor involved in obtaining related empirical data. The study presented here was carried out in Pallisa district, Uganda and (1) mapped crop residue yields and ...
  • Interactions between the germplasm of okra (Abelmoschus spp.) and Aphids with special reference to Aphis gossypii Glover (Hemiptera: Aphididae) in Cameroon 

    Abang, A.F. (University of Yaounde I, 2018)
    Aphis gossypii Glover (Hemiptera: Aphididae) is one of the major pests of okra (Abelmoschus spp). On one hand, direct damages due to its feeding habit results in curling and deformation of young leaves. On the other hand, indirect damages are caused because of honeydew secreted on fruits and leaves with, which in turn may promot growth of black sooty mould. The black sooty mouls stain and reduce fruit and leaf quality and reduce photosynthetic activity. In addition, honeydew attracts ants that ...
  • Soybean (Glycine max) response to rhizobia inoculation as influenced by soil nitrogen levels 

    Nyaguthii, M.C. (Suba, Kenya, 2017-05)
    Inoculation of soybean (Glycine max) is an efficient and convenient way of introducing rhizobia to soil and subsequently the rhizosphere of the crop. However, its full potential in sub-Saharan Africa is yet to be realized due to effects of varying soil limiting conditions. Critical levels of nitrogen (N) below and above which response is not guaranteed are unknown. The objective of the study was to determine the critical range of N outside which response to inoculation is hindered. Below the lower ...
  • Response of promiscuous soybean to rhizobial inoculation in combination with organic and mineral fertilizers in some soils of the Nigeria Guinea Savanna 

    Ekaette, J.E. (Federal University of Technology, Minna, 2017)
    Effective soybean rhizobia are seldom found in sufficient or large numbers in the soils that have no history of soybean cultivation. There may be a need for soybean grown in such soils to be supplied with inoculant rhizobia to ensure optimal inputs from biological nitrogen fixation. Reports have indicated that yield per hectare of soybean in farmers’ fields are still very low. This scenario calls for trials that are capable of establishing some of the biophysical factors limiting the yield of ...
  • Genetic improvement of cowpea for resistance to thrips (Megalurthrips sjostedti) in Mali 

    Doumbia, I. (University of Ghana, 2016)
    Several techniques, such as chemical and bio-insecticides have been applied by farmers to control thrips (Megalurothrips sjostedti) damage on cowpea. Many factors, such as improper amount of insecticides to dilute in water, cost and unavailability of insecticides and equipment limit the effective control of these thrips. Incorporating thrips resistant genes into local adapted landraces could increase farmers‘ income. These new lines could be grown with minimal insecticide application. Participatory ...
  • Response of cowpea (Vigna unguiculata L.Walp) varieties to Bradyrhizobial strains (USDA 3384 and 3451) and phosphorus levels in the Sudan Savanna of Nigeria 

    Musa, M. (Bayero University, 2017-01)
    Field trials were conducted during the 2015 wet season at the Bayero University Kano Teaching and Research Farm (110 58’N, 8025’E and 475m above sea level) and National Institute of Horticultural Research Technology (NIHORT) Bagauda (lat. 120 08'N, long. 80 32'E, 500m above sea level). The study was conducted to determine the response of cowpea (Vigna unguiculata L. Walp) varieties to rhizobium and phosphorus levels in the sudan savannah of Nigeria. The treatments consisted of four cowpea varieties ...
  • Bio-ecology and systematics of the scale insect Stictococcus vayssierei Richard, 1971 (Hemiptera: Stictococcidae), a major pest of root and tuber crops in the Nigero-Congolian forest block 

    Doumtsop, F.A.R. (2021)
    Stictococcus vayssierei Richard, 1971 commonly known as the African root and tuber scale (ARTS), was first identified as an agricultural pest in the early 1980s. Following population outbreaks in Cameroon and the Democratic Republic of Congo in late 1980s – early 1990s, the insect is currently reported as one of the major pests threatening root and tuber crop production in Central Africa. Outbreaks can merely be viewed as symptomatic of some breakdown of internal organization and extrinsic factors ...
  • Comparative assessment of genetic diversity in tissue culture - and field - propagated white yam (Dioscorea rotundata) accession using molecular marker (SSRs) and morphological characterization 

    Abu, G.I. (Cross River University of Technology, 2018-04)
    This experiment was conducted at theInternational Institute of Tropical Agriculture (IITA), Ibadan. The objective of the study was to contribute to the understanding of Dioscorea rotundata maintained in vitro and field to observe if there could be any variability in their genetic material due to their different storage conditions by genotyping 43 accessions from in vitro and field populations using 11 microsatellite markers and 25 morphological descriptors to access variability within and between ...
  • Evaluation of drought tolerant maize hybrids for tolerance to heat and combined drought and heat stresses 

    Adegun, A.A. (University of Ibadan, 2019-12)
    Low maize yields and the impacts of climate change on maize production shows the need to improve yields in Sub-Saharan Africa. Thus the objective of this study is to evaluate DT maize hybrids under heat and combined heat and drought stresses and to determine the relationship between grain yield and other agronomical trait. In this study two groups of hybrids were used. Eighteen top cross maize hybrids, one local check and a standard check laid-out in alpha lattice of 5x4 with two replicates, the ...
  • Agriculture and food industry in Nigeria 

    Abass, A.; Shiwachi, H. (2003)

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