11 results on '"Olojede, Adeyemi"'
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2. Screening preemergence herbicides for weed control in cassava
- Author
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Ekeleme, Friday, Dixon, Alfred, Atser, Godwin, Hauser, Stefan, Chikoye, David, Olorunmaiye, Patience M., Olojede, Adeyemi, Korie, Sam, and Weller, Stephen
- Published
- 2020
3. Relating Local Variability in Fertiliser Nutrient Response in Cassava Under Smallholder Farming Conditions to Digital Soil Map Information
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Masunga, Habai, primary, Tariku, Meklit, additional, Ezui, Kodjovi, additional, Mlay, Peter, additional, Olojede, Adeyemi, additional, Olowokere, Florence, additional, Busari, Mutiu Abolanle, additional, Hauser, Stefan, additional, Kreye, Christine, additional, Baijukya, Frederick, additional, Merckx, Roel, additional, and Pypers, Pieter, additional
- Published
- 2023
- Full Text
- View/download PDF
4. Breedbase: a digital ecosystem for modern plant breeding
- Author
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Morales, Nicolas, primary, Ogbonna, Alex C, additional, Ellerbrock, Bryan J, additional, Bauchet, Guillaume J, additional, Tantikanjana, Titima, additional, Tecle, Isaak Y, additional, Powell, Adrian F, additional, Lyon, David, additional, Menda, Naama, additional, Simoes, Christiano C, additional, Saha, Surya, additional, Hosmani, Prashant, additional, Flores, Mirella, additional, Panitz, Naftali, additional, Preble, Ryan S, additional, Agbona, Afolabi, additional, Rabbi, Ismail, additional, Kulakow, Peter, additional, Peteti, Prasad, additional, Kawuki, Robert, additional, Esuma, Williams, additional, Kanaabi, Micheal, additional, Chelangat, Doreen M, additional, Uba, Ezenwanyi, additional, Olojede, Adeyemi, additional, Onyeka, Joseph, additional, Shah, Trushar, additional, Karanja, Margaret, additional, Egesi, Chiedozie, additional, Tufan, Hale, additional, Paterne, Agre, additional, Asfaw, Asrat, additional, Jannink, Jean-Luc, additional, Wolfe, Marnin, additional, Birkett, Clay L, additional, Waring, David J, additional, Hershberger, Jenna M, additional, Gore, Michael A, additional, Robbins, Kelly R, additional, Rife, Trevor, additional, Courtney, Chaney, additional, Poland, Jesse, additional, Arnaud, Elizabeth, additional, Laporte, Marie-Angélique, additional, Kulembeka, Heneriko, additional, Salum, Kasele, additional, Mrema, Emmanuel, additional, Brown, Allan, additional, Bayo, Stanley, additional, Uwimana, Brigitte, additional, Akech, Violet, additional, Yencho, Craig, additional, de Boeck, Bert, additional, Campos, Hugo, additional, Swennen, Rony, additional, Edwards, Jeremy D, additional, and Mueller, Lukas A, additional
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- 2022
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5. Cassava-maize intercropping systems in southern Nigeria: Radiation use efficiency, soil moisture dynamics, and yields of component crops
- Author
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Charles Chigemezu Nwokoro, Christine Kreye, Magdalena Necpalova, Olojede Adeyemi, Matti Barthel, Pieter Pypers, Stefan Hauser, and Johan Six
- Subjects
Planting density ,Fertilizer management ,Cassava-maize intercropping ,Photosynthetically active radiation ,Soil Science ,Soil moisture ,Radiation use efficiency ,Agronomy and Crop Science - Abstract
Efficient utilization of incident solar radiation and rainwater conservation in rain-fed smallholder cropping systems require the development and adoption of cropping systems with high resource use efficiency. Due to the popularity of cassava-maize intercropping and the food security and economic importance of both crops in Nigeria, we investigated options to improve interception of photosynthetically active radiation (IPAR), radiation use efficiency (RUE), soil moisture retention, and yields of cassava and maize in cassava-maize intercropping systems in 8 on-farm researcher-managed multi-location trials between 2017 and 2019 in different agro-ecologies of southern Nigeria. Treatments were a combination of (1) maize planting density (low density at 20,000 maize plants ha-1 versus high density at 40,000 maize plants ha-1, intercropped with 12,500 cassava plants ha-1); (2) fertilizer application and management targeting either the maize crop (90 kg N, 20 kg P and 37 kg K ha-1) or the cassava crop (75 kg N, 20 kg P and 90 kg K ha-1), compared with control without fertilizer application. Cassava and maize development parameters were highest in the maize fertilizer regime, resulting in the highest IPAR at high maize density. The combined intercrop biomass yield was highest at high maize density in the maize fertilizer regime. Without fertilizer application, RUE was highest at low maize density. However, the application of the maize fertilizer regime at high maize density resulted in the highest RUE, soil moisture content, and maize grain yield. Cassava storage root yield was higher in the cassava fertilizer regime than in the maize fertilizer regime. We conclude that improved IPAR, RUE, soil moisture retention, and grain yield on nutrient-limited soils of southern Nigeria, or in similar environments, can be achieved by intercropping 40,000 maize plants ha-1 with 12,500 cassava plants ha-1 and managing the system with the maize fertilizer regime. However, for higher cassava storage root yield, the system should be managed with the cassava fertilizer regime., Field Crops Research, 283, ISSN:0378-4290, ISSN:1872-6852
- Published
- 2022
6. Increasing cassava root yield on farmers' fields in Nigeria through appropriate weed management
- Author
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Ekeleme, Friday, primary, Dixon, Alfred, additional, Atser, Godwin, additional, Hauser, Stefan, additional, Chikoye, David, additional, Korie, Sam, additional, Olojede, Adeyemi, additional, Agada, Mary, additional, and Olorunmaiye, Patience M., additional
- Published
- 2021
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7. Developing recommendations for increased productivity in cassava-maize intercropping systems in Southern Nigeria
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Meklit Tariku, Charles Chigemezu Nwokoro, Olojede Adeyemi, Magdalena Necpalova, Christine Kreye, Mark Tokula, Florence Olowokere, Johan Six, M. A. Busari, Pieter Pypers, and Stefan Hauser
- Subjects
biology ,Value cost ratio ,Plant density ,Cassava maize intercropping ,Soil Science ,Intercropping ,engineering.material ,biology.organism_classification ,Article ,Fertilizer ,Profitability ,Southern Nigeria ,Crop ,Productivity (ecology) ,Agronomy ,Yield (wine) ,engineering ,Cropping system ,Soil fertility ,Agronomy and Crop Science ,Cropping ,Mathematics - Abstract
Cassava-maize intercropping is a common practice among smallholder farmers in Southern Nigeria. It provides food security and early access to income from the maize component. However, yields of both crops are commonly low in farmers’ fields. Multi-locational trials were conducted in Southern Nigeria in 2016 and 2017 to investigate options to increase productivity and profitability through increased cassava and maize plant densities and fertilizer application. Trials with 4 and 6 treatments in 2016 and 2017, respectively were established on 126 farmers’ fields over two seasons with a set of different designs, including combinations of two levels of crop density and three levels of fertilizer rates. The maize crop was tested at low density (LM) with 20,000 plants ha−1 versus high density (HM) with 40,000 plants ha−1. For cassava, low density (LC) had had 10,000 plants ha−1 versus the high density (HC) with 12,500 plants ha−1.; The fertilizer application followed a regime favouring either the maize crop (FM: 90 kg N, 20 kg P and 37 kg K ha−1) or the cassava crop (FC: 75 kg N, 20 kg P and 90 kg K ha−1), next to control without fertilizer application (F0). Higher maize density (HM) increased marketable maize cob yield by 14 % (3700 cobs ha−1) in the first cycle and by 8% (2100 cobs ha−1) in the second cycle, relative to the LM treatment. Across both cropping cycles, fertilizer application increased cob yield by 15 % (5000 cobs ha−1) and 19 % (6700 cobs ha−1) in the FC and FM regime, respectively. Cassava storage root yield increased by 16 % (4 Mg ha−1) due to increased cassava plant density, and by 14 % (4 Mg ha−1) due to fertilizer application (i.e., with both fertilizer regimes) but only in the first cropping cycle. In the second cycle, increased maize plant density (HM) reduced cassava storage root yield by 7% (1.5 Mg ha−1) relative to the LM treatment. However, the negative effect of high maize density on storage root yield was counteracted by fertilizer application. Fresh storage root yield increased by 8% (2 Mg ha−1) in both fertilizer regimes compared to the control without fertilizer application. Responses to fertilizer by cassava and maize varied between fields. Positive responses tended to decline with increasing yields in the control treatment. The average value-to-cost ratio (VCR) of fertilizer use for the FM regime was 3.6 and higher than for the FC regime (VCR = 1.6), resulting from higher maize yields when FM than when FC was applied. Revenue generated by maize constituted 84–91% of the total revenue of the cropping system. The highest profits were achieved with the FM regime when both cassava and maize were grown at high density. However, fertilizer application was not always advisable as 34 % of farmers did not realize a profit. For higher yields and profitability, fertilizer recommendations should be targeted to responsive fields based on soil fertility knowledge., Field Crops Research, 272, ISSN:0378-4290, ISSN:1872-6852
- Published
- 2021
8. Assessment of Weeds of Cassava and Farmers’ Management Practices in Nigeria
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Ekeleme, F., Atser, G., Dixon, A., Hauser, S., Chikoye, D., Olorunmaiye, P. M., Sokoya, G., Alfred, J., Okwusi, Moses C., Korieocha, D.S., Olojede, Adeyemi O., Ayankanmi, Toye, and Lagoke, S.T.O.
- Subjects
lcsh:Agriculture ,farmer weed management ,lcsh:S ,Nigeria ,weed species composition ,cassava farm size ,cassava weeds - Abstract
Competition from weeds is an obstacle to profitable cassava production. Knowledge of weed species negatively affecting productivity is essential for effective management. A field evaluation of weeds and management practices was conducted between May and June in 2014 and 2015 in 200 cassava farms in three agroecologies in Nigeria. Detrended Correspondence Analysis identified four distinct clusters depicting variation in weed species composition among the agroecologies. Soil pH and silt content, fallow length, cultivation method, and weed management method contributed to the variation in species composition. Farmers and field evaluations identified Euphorbia heterophylla, Imperata cylindrica, Aspilia africana, Panicum maximum, Chromolaena odorata, Commelina benghalensis, Digitaria horizontalis, and Rottboellia cochinchinensis as major problem weeds in cassava. Farmers’ management of these weeds varied across zones, suggesting that weed management strategies in cassava should be focused on ecological zones. In the Humid forest, hoe-weeding (51.2%) and slashing (43.0%) with machetes were the predominant methods of control. Herbicide use was high in the Southern Guinea Savanna and medium to high in the Derived Savanna (26.3-42.2%). Education to increase farmers’ knowledge of the problematic of weeds and to improve both their choice of appropriate herbicides and their safe use is critical to effective and efficient weed management in cassava., Evaluation des mauvaises herbes dans la culture du manioc et pratiques de gestion des agriculteurs au NigériaLa concurrence des mauvaises herbes est un obstacle à la rentabilité de la production du manioc. La connaissance des espèces de mauvaises herbes qui affectent négativement la productivité du manioc est essentielle pour une gestion efficace. Une étude a été conduite entre mai et juin 2014 et 2015 pour évaluer les mauvaises herbes dans 200 exploitations agricoles de manioc, dans trois zones agroécologiques au Nigeria. L’Analyse des Correspondances Détendancées (ACD) a permis d’identifier quatre groupes distincts illustrant la variation des espèces de mauvaises herbes parmi les zones agroécologiques. Le pH du sol et la teneur en limon, la durée des jachères, la méthode de culture et la méthode de gestion des mauvaises herbes ont contribué à la variation de la composition des espèces. L’évaluation par les agriculteurs et sur le terrain ont identifié Euphorbia heterophylla, Imperata cylindrica, Aspilia africana, Panicum maximum, Chromolaena odorata, Commelina benghalensis, Digitaria horizontalis, et Rottboellia cochinchinensis comme principales mauvaises herbes du manioc. La gestion de ces mauvaises herbes par les paysans varie à travers les zones, suggérant ainsi que les stratégies de gestion de ces mauvaises herbes devraient être axées sur les zones écologiques. Dans la zone forestière humide, le désherbage à la houe (51,2%) et à la machette (43,0%) étaient les principales méthodes de contrôle. L’utilisation d’herbicides était élevée dans le sud de la savane guinéenne et modérée dans la savane dérivée. L’éducation afin d’accroitre la connaissance des agriculteurs sur la problématique des mauvaises herbes et l’amélioration de leur choix à la fois sur les herbicides appropriés et leur utilisation sans risque est essentielle pour une gestion efficace des mauvaises herbes dans la culture du manioc.
- Published
- 2019
9. Weed Management in Cassava in Africa: Challenges and Opportunities
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Ekeleme, Friday, primary, Hauser, Stefan, additional, Atser, Godwin, additional, Dixon, Alfred, additional, Weller, Stephen, additional, Olorunmaiye, Patience, additional, Usman, Hughes, additional, Olojede, Adeyemi, additional, and Chikoye, David, additional
- Published
- 2016
- Full Text
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10. EFFECTS OF ENZYME SUPPLEMENTATION OF CASSAVA FLOURBASED DIETS ON PERFORMANCE AND ECONOMIC EFFICIENCY OF BROILER CHICKEN.
- Author
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OJEWOLA, Gbolagunte S., OKEKE, Uzodinma L., and OLOJEDE, Adeyemi O.
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BROILER chickens ,ENZYMES ,CASSAVA flour ,ANIMAL feeds ,ANIMAL feeding - Abstract
Two hundred and forty three day-old early strain (Abor acre) broiler chicks were randomly assigned to nine treatment diets, replicated thrice in a Completely Randomized Design (CRD) to evaluate the substitutional effects of enzymes supplemented and non-supplemented dietary cassava flour for maize in broiler nutrition. The experiment lasted 49days (7weeks). Growth performance, feed and economic efficiency, carcass and organ proportions, serum chemistry and hematological parameters were significantly (P<0.05) influenced. Birds fed diet 1 gave a superior (P<0.05) performance over and above all the other diets in terms of the mean final weight (1885.18g), body weight gain (1,834.19g), revenue (₦1,100.20) and gross margin (₦125.33) realizable, hematology and serum chemistry values. This was closely followed by birds fed diets 2, 3, 4 and 5. The results further showed that substitution of maize with enzymes supplemented and non-supplemented cassava flour beyond 50% in the broiler diets reduced revenue (₦) realizable and gross margin (₦), an indication that the diets did not optimize economic returns nor enhance biological values. In conclusion, diets 1 on one hand and 2, 3, 4 and 5 on the other are hereby recommended for optimal performance and economic returns. [ABSTRACT FROM AUTHOR]
- Published
- 2017
11. Breedbase: a digital ecosystem for modern plant breeding.
- Author
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Morales N, Ogbonna AC, Ellerbrock BJ, Bauchet GJ, Tantikanjana T, Tecle IY, Powell AF, Lyon D, Menda N, Simoes CC, Saha S, Hosmani P, Flores M, Panitz N, Preble RS, Agbona A, Rabbi I, Kulakow P, Peteti P, Kawuki R, Esuma W, Kanaabi M, Chelangat DM, Uba E, Olojede A, Onyeka J, Shah T, Karanja M, Egesi C, Tufan H, Paterne A, Asfaw A, Jannink JL, Wolfe M, Birkett CL, Waring DJ, Hershberger JM, Gore MA, Robbins KR, Rife T, Courtney C, Poland J, Arnaud E, Laporte MA, Kulembeka H, Salum K, Mrema E, Brown A, Bayo S, Uwimana B, Akech V, Yencho C, de Boeck B, Campos H, Swennen R, Edwards JD, and Mueller LA
- Subjects
- Algorithms, Crops, Agricultural genetics, Software, Ecosystem, Plant Breeding
- Abstract
Modern breeding methods integrate next-generation sequencing and phenomics to identify plants with the best characteristics and greatest genetic merit for use as parents in subsequent breeding cycles to ultimately create improved cultivars able to sustain high adoption rates by farmers. This data-driven approach hinges on strong foundations in data management, quality control, and analytics. Of crucial importance is a central database able to (1) track breeding materials, (2) store experimental evaluations, (3) record phenotypic measurements using consistent ontologies, (4) store genotypic information, and (5) implement algorithms for analysis, prediction, and selection decisions. Because of the complexity of the breeding process, breeding databases also tend to be complex, difficult, and expensive to implement and maintain. Here, we present a breeding database system, Breedbase (https://breedbase.org/, last accessed 4/18/2022). Originally initiated as Cassavabase (https://cassavabase.org/, last accessed 4/18/2022) with the NextGen Cassava project (https://www.nextgencassava.org/, last accessed 4/18/2022), and later developed into a crop-agnostic system, it is presently used by dozens of different crops and projects. The system is web based and is available as open source software. It is available on GitHub (https://github.com/solgenomics/, last accessed 4/18/2022) and packaged in a Docker image for deployment (https://hub.docker.com/u/breedbase, last accessed 4/18/2022). The Breedbase system enables breeding programs to better manage and leverage their data for decision making within a fully integrated digital ecosystem., (© The Author(s) 2022. Published by Oxford University Press on behalf of Genetics Society of America.)
- Published
- 2022
- Full Text
- View/download PDF
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