IITA Bibliography System: Recent submissions

Now showing items 461-480 of 8125

    • Combining manure with mineral N fertilizer maintains maize yields: evidence from four long-term experiments in Kenya 

      Laub, M.; Corbeels, M.; Ndungu, S.M.; Mucheru-Muna, M.; Mugendi, D.; Necpalova, M.; Van de Broek, M.; Waswa, W.; Vanlauwe, B.; Six, J. (2023-02-01)
      Context Crop productivity in sub-Saharan Africa cannot be substantially improved without simultaneously addressing short-term crop nutrient demand and long-term soil fertility. Integrated soil fertility management tackles both by the combined application of mineral fertilizers and organic resource inputs but few studies examined its‘ long-term effectiveness. Objective To address this knowledge gap, this study analysed maize yield trends in four long-term (31–37 cropping seasons) field experiments ...

    • Performance evaluation of available strains of Nile tilapia (Oreochromis niloticus) fed commercial and locally-made feeds in the Democratic Republic of the Congo 

      Yossa, R.; Basiita, R.K.; Namegabe, J.M.; Trinh, T.Q.; Matempa, D.; Manzwanzi, P.; Bwamayama, L.; Cole, S.M.; Matungulu, P.; Dontsop-Nguezet, P.; Vanlauwe, B.; Ndavi, M.; Benzie, J. (2023)
      The performance of two strains of Nile tilapia (the Nyakabera and Lake Kivu) fed a commercial feed or either a fishmeal-based or a fishmeal-free feed formulated using local ingredients was evaluated for 99 days in Bukavu, eastern highlands of the DR Congo (Experiment 1). Strain × feed interaction was significant (p < 0.05) for final body weight (FBW) and condition factor (CF). Growth of both strains was best with the commercial feed. Fish-meal free formulated feed resulted in similar or better ...

    • MESIRES, IRA and NCRE: Annual Report 1990 

      USAID; International Institute of Tropical Agriculture (USAID-IITA, 1991)

    • Midaltitude maize breeding: populations, inbreds and hybrids from the IITA-NCRE-Cameroon program 

      Everett, L. (IInternational Institute of Tropical Agriculture, 1991)

    • An agro-socioeconomic survey on farmers in the north-west province, Cameroon 1983 

      McHugh, D. (United States Agency for International Development, 1983)

    • Adaptive Research Programme: Technical Report No. 2 

      Walton, I.C. (North West Development Authority, Cameroon, 1986-12)

    • Maize-based cropping systems in the Ndop plain of the north west province, Cameroon - a monitored farm survery, with labor utilization data 

      USAID; IITA; McHugh, D. (United States Agency for International Development, 1988)

    • 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 ...

    • Farming systems survey of Meme division south west province Republic of Cameroon 

      USAID; International Institute of Tropical Agriculture (United States Agency for International Development, 1987)
      Background: In order to help IRA researchers on and off station direct their work more towards the potentials and needs of food-crop farmers in the South West and Littoral, the TLU at Ekona is undertaking a series of farming systems surveys. The series began in 1986. Objectives: To provide useful information to IRA breeders and agronomists, to MINAGRI extension workers and planners, and to the TLU for its on-farm trial program. Methods: Preliminary analysis of Meme Division soils, climate and ...

    • Farming systems in the Bui highlands of the north west province of Cameroon: a rapid rural appraisal survey 

      USAID; International Institute of Tropical Agriculture (United States Agency for International Development, 1990)

    • Feed the Future: Nigeria Integrated Agriculture Activity - 24th Edition 

      USAID; nternational Institute of Tropical Agriculture (United States Agency for International Development, 2023-05)

    • Reduction of P fertilizer requirement using lime and Mucuna on high P-sorption soils of NW Cameroon. 

      Yamoah, C.F.; Ngueguim, M.; Ngong, C.; Dias, D.K.W. (1996)
      Soil acidity and high phosphorus (P) fixation are real problems in the Highlands of Central and Eastern Africa. Phosphatic fertilizers are imported and costly for the average farmer. We used lime and Mucuna green manure to reduce fertilizer P requirement of traditional food crops in NW Camcroon. Lime and phosphorus significantly improved stand count, root and stem weights as well as yields of maize (Zea mays L.), bean (Phaseolus spp.), and Irish potato (Solanum tuberosum L.) in three consecutive ...

    • Fertility characterization of soils at six research sites in NW Cameroon 

      Yamoah, C.F.; Ngueguim, M.; Ngong, C.; Osiname, O.A.; Tambi, E. (1995-01)
      Fertility capability of surface (0–20 cm) soils was evaluated at six sites in the North-West Cameroon highlands. Two main soil groups, designated as Classes A and B, were identified based on elevation. The Class A soils from low elevations (600–1178 m) had higher Ca, Mg, K, pH, sorbed less P and were lower in organic carbon and sesquioxides than the highland (> 1200 m) soils. Soil acidity (Al saturation > 30%) and high P sorption appeared to be the most limiting factors to crop production especially ...

    • Connecting data for consumer preferences, food quality, and breeding in support of market-oriented breeding of root, tuber, and banana crops 

      Arnaud, E.; Menda, N.; Tran, T.; Asiimwe, A.; Kanaabi, M.; Meghar, K.; Forsythe, L.; Kawuki, R.; Ellebrock, B.; Kayondo, S.I.; Agbona, A.; Zhang, X.; Mendes, T.; Laporte, M.A.; Nakitto, M.; Ssali, R.T.; Asfaw, A.; Uwimana, B.; Ogbete, C.; Makunde, G.; Maraval, I.; Mueller, L.; Bouniol, A.; Fauvelle, E.; Dufour, D. (2023)
      The 5-year project ‘Breeding roots, tubers and banana products for end user preferences’ (RTBfoods) focused on collecting consumers' preferences on 12 food products to guide breeding programmes. It involved multidisciplinary teams from Africa, Latin America, and Europe. Diverse data types were generated on preferred qualities of users (farmers, family and entrepreneurial processors, traders or retailers, and consumers). Country-based target product profiles were produced with a comprehensive market ...

    • Implication of blanket NPK application on nutrient balance of maize based on soil and tissue diagnosis approaches in the savannas of northern Nigeria 

      Aliyu, K.T.; Kamara, A.; Huising, J.E.; Adam, A.M.; Shehu, B.M.; Jibrin, J.M. (2023)
      Improper nutrient management reduces the yield and affects the nutrient status of crops. This study aimed to diagnose the nutrients limitation in maize. A three-year multi-location (348 sites) nutrient experiments were conducted in randomized block design to analyse nutrients limitation for maize production under conventional fertilizer recommendation system in Nigeria using DRIS, and to identify soil factors that influence DRIS indices using random forest model. DRIS indices for nutrients were ...

    • Do soil and water conservation practices influence crop productivity and household welfare? Evidence from rural Nigeria 

      Ogunniyi, A.I.; Omotayo, A.O.; Olagunju, K.O.; Motunrayo, O.; Awotide, B.A.; Mavrotas, G.; Aremu, A.O. (2023-04)
      One of the most serious challenges threatening agricultural sustainability in Nigeria is land degradation. Although this issue has received little attention, soil and water conservation practices have been identified as a possible pathway out of the potential problems posed by land degradation. Therefore, the central research question that this paper tries to address is the following: Do adoption of soil and water conservation (SWC) practices affect crop productivity and household welfare? This ...

    • Prediction of functional characteristics of gari (cassava flakes) using near-infrared reflectance spectrometry 

      Adesokan, M.; Alamu, E.O.; Fawole, S.; Maziya-Dixon, B. (2023-05-10)
      Gari is a creamy, granular flour obtained from roasting fermented cassava mash. Its preparation involves several unit operations, including fermentation, which is essential in gari production. Fermentation brings about specific biochemical changes in cassava starch due to the actions of lactic acid bacteria. Consequently, it gives rise to organic acids and a significant reduction in the pH. Consumer preferences for gari are influenced by these changes and impact specific functional characteristics, ...

    • Elite cassava clones (Manihot esculenta) grown in Zambia: effects of drying techniques on their chemical, functional, and pasting properties. 

      Alamu, E.O.; Manda, N.; Ntawuruhunga, P.; Abass, A.; Maziya-Dixon, B. (2023)
      Introduction: Cassava (Manihot esculanta) is becoming an important crop in most developing countries, especially Zambia. However, cassava roots deteriorate quickly after harvest, producing flour or chips of sub-optimal quality. Hence the evaluation of processing procedures to extend the product’s shelf-life cannot be overemphasized. This study investigated the effects of different drying methods on the chemical, functional and pasting properties of selected advanced cassava clones grown in Zambia. ...

    • Genetic mapping, candidate gene identification and marker validation for host plant resistance to the race 4 of Fusarium oxysporum f. sp. cubense using Musa acuminata ssp. malaccensis 

      Chen, A.; Sun, J.; Viljoen, A.; Mostert, D.; Xie, Y.; Mangila, L.; Bothma, S.; Lyons, R.; Hřibová, E.; Christelova, P.; Uwimana, B.; Amah, D.; Pearce, S.C.; Chen, N.; Batley, J.; Edwards, D.; Doležel, J.; Crisp, P.; Brown, A.; Martin, G.; Yahiaoui, N.; D'Hont, A.; Coin, L.; Swennen, R.; Aitken, E.A.B. (2023-06)
      Fusarium wilt of banana is a devastating disease that has decimated banana production worldwide. Host resistance to Fusarium oxysporum f. sp. Cubense (Foc), the causal agent of this disease, is genetically dissected in this study using two Musa acuminata ssp. Malaccensis segregating populations, segregating for Foc Tropical (TR4) and Subtropical (STR4) race 4 resistance. Marker loci and trait association using 11 SNP-based PCR markers allowed the candidate region to be delimited to a 12.9 cM genetic ...

    • Seed certification and maize, rice and cowpea productivity in Nigeria: an insight based on nationally representative farm household data and seed company location data 

      Takeshima, H.; Abdoulaye, T.; Andam, K.S.; Edeh, H.O.; Fasoranti, A.; Haile, B.; Kumar, P.L.; Nwagboso, C.; Ragasa, C.; Spielman, D.; Assfaw Wossen, T. (International Food Policy Research Institute, 2022-12)
      Despite the potential importance of seed quality to agricultural productivity growth, many governments in sub-Saharan Africa lack the capacity to expand quality assurance systems even where there is expressed interest. This study aims to evidence the value of quality assurance systems with an analysis of efforts to produce and distribute certified seed in Nigeria. We assess the associations between quantities of certified seeds produced and spatial variations in production locations proxied by ...