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Journal articles on the topic 'Yield and white yam'

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Published: 3 June 2025

Last updated: 31 July 2025

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1

Benson, G. A. S. and Oso, Y. O. "Effect of Planting and Mulching Materials on Growth and Yield of White Yam (Dioscorea rotundata) in Ikorodu, Lagos State, Nigeria." Journal of Experimental Agriculture International 46, no. 4 (2024): 110–16. http://dx.doi.org/10.9734/jeai/2024/v46i42346.

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The effect of planting and mulching materials on growth and yield of white yam was evaluated in Ikorodu. White yam head, bottom and seed yam were used as planting materials while cooking banana pseudostem, banana leaves and guinea grass (Panicum maximum) were used as mulching materials and control plot was left unmulched.. Planting and mulching materials had significant effect on days to sprouting, vine length and yield of white yam. Seed yam performed relatively better than head and bottom setts in growth and yield. Grass mulch significantly (P < 0.05) gave higher rate of emergence and had

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ADOMAKO, Josep, Emmanuel OTOO, Yaw DANSO, David Kwadwo ALHASSAN, Patrick ADEBOLA, and Asrat ASFAW. "Resistance screening of white yam (Dioscorea rotundata Poir.) accessions against Meloidogyne incognita (Kofoid & White, 1919) Chitwood, 1949 using yam vines." Acta agriculturae Slovenica 118, no. 1 (2022): 1. http://dx.doi.org/10.14720/aas.2022.118.1.1814.

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<p class="042abstractstekst">Root-knot nematode (<em>Meloidogyne incognita</em>) is an economically important phytoparasitic nematode species. In yam production, therefore, breeding for nematode resistance is an important environmentally friendly tool to manage root-knot nematodes damage. The aim of this study was to determine the reaction of 18 yam accessions to <em>M. incognita </em>inoculation under screen house conditions using single node vine cuttings. Vines of each accession were planted in sterilized soil and inoculated with 1000 infective juveniles of &lt

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3

Ekwere, Okon, Arit Efretuei, and Patrick Udounang. "Evaluation of Some Growth and Yield Traits of Nine Cultivars of White Guinea Yam (Dioscorea rotundata poir.)." AKSU Journal of Agriculture and Food Sciences 7, no. 2 (2023): 83–96. http://dx.doi.org/10.61090/aksuja.2023.013.

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White guinea yam is a chief source of carbohydrate in West Africa. Knowledge of the relationship between its agronomic traits and tuber yield can contribute to improving management practices and selecting the right cultivars for optimum yield. Field experiments were conducted during the 2021 and 2022 early cropping seasons at the Teaching and research farm of the Akwa Ibom State University, Obio Akpa Campus, to study the agronomic and yield traits of some white guinea yam cultivars. The experiment consisted of eight cultivars of the white yam (TDr 0900135, TDr 0900295, TDr 1401593, TDr 1401785

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4

Asadu, C. L. A., F. O. R. Akamigbo, F. I. Nweke, and H. C. Ezumah. "Evaluation of six cultivars of white yam (Dioscorea rotundata) across three yam-growing areas in southeastern Nigeria." Journal of Agricultural Science 127, no. 4 (1996): 463–68. http://dx.doi.org/10.1017/s0021859600078680.

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SUMMARYA split split-plot experiment was conducted in the 1986 and 1987 cropping seasons in three major yam-growing areas in southeastern Nigeria to assess the performance and yield stability of six cultivars of white yam (Dioscorea rotundata Poir). Location, fertilizer and cultivar, as well as some of their interaction effects, significantly affected tuber yields.The best location for yam production, based on the overall performance of the cultivars, was the sub-humid Guinea savanna, followed by the humid forest-regrowth and then the transitional forestsavanna zone. Except for two cultivars,

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5

Adesokan, Michael, Emmanuel Oladeji Alamu, Segun Fawole, Asrat Asfaw, and Busie Maziya-Dixon. "Elite Genotypes of Water Yam (Dioscorea alata) Yield Food Product Quality Comparable to White Yam (Dioscorea rotundata)." Applied Sciences 14, no. 9 (2024): 3704. http://dx.doi.org/10.3390/app14093704.

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Water yam (Dioscorea alata), also known as winged yam, is one of the most economically significant yam species, serving as a staple food crop in tropical and subtropical regions. Its widespread cultivation is due to its favorable agronomic characteristics, including high yield, improved tuber storability, and significant nutritional and health benefits. Despite these advantages, water yam often remains underutilized due to consumer biases towards its traditional food product quality, particularly for pounded yam preparations. In this study, we evaluated fifty-eight improved genotypes of water

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Pouya, Nestor, Valérie Kouamé Hgaza, Delwendé Innocent Kiba, et al. "Water Yam (Dioscorea alata L.) Growth and Tuber Yield as Affected by Rotation and Fertilization Regimes across an Environmental Gradient in West Africa." Agronomy 12, no. 4 (2022): 792. http://dx.doi.org/10.3390/agronomy12040792.

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Yam (Dioscorea spp.) is a staple food crop and a source of income for millions of people in West Africa. Traditionally, in West Africa, yams are grown without any external inputs, leading to low tuber yields. The rapid decrease of tuber yield observed after the first yam cropping season has been ascribed to nutrient depletion and/or to the accumulation of yam-specific pests and diseases. This has led farmers to grow yam on new surfaces under fallow each year. Using a transdisciplinary approach, we identified different yam-based rotations and fertilization regimes that could stabilize yam produ

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Norman, Prince E., Agyemang Danquah, Asrat Asfaw, Pangirayi B. Tongoona, Eric Y. Danquah, and Robert Asiedu. "Seed Viability, Seedling Growth and Yield in White Guinea Yam." Agronomy 11, no. 1 (2020): 2. http://dx.doi.org/10.3390/agronomy11010002.

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The yam is an economic tuber crop utilized for food, feed, and various industrial applications. Botanical seed viability, seedling growth, and development are among factors that influence plant population dynamics, development, structure, and sustainability. However, little is known about seed viability, growth, and yield potential of seed-progenies developed using different mating designs. This study assessed seed germination, seedling growth, and yield traits in seed-progenies developed using North Carolina I (NC-1) and polycross mating designs. For this, seed germination and seedling nurser

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8

Adewumi, Adeyinka S., Paterne A. Agre, Paul A. Asare, et al. "Exploring the Bush yam (Dioscorea praehensilis Benth) as a Source of Agronomic and Quality Trait Genes in White Guinea yam (Dioscorea rotundata Poir) Breeding." Agronomy 12, no. 1 (2021): 55. http://dx.doi.org/10.3390/agronomy12010055.

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Yam (Dioscorea spp.) is an important food security crop in the tropics and subtropics. However, it is characterized by a narrow genetic base within cultivated and breeding lines for tuber yield, disease resistance, and postharvest traits, which hinders the yam breeding progress. Identification of new sources of desirable genes for these traits from primary and secondary gene pools is essential for this crop improvement. This study aimed at identifying potential sources of genes for yield and quality traits in a panel of 162 accessions of D. praehensilis, a semi-domesticated yam species, for im

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Norman, Prince Emmanuel, Pangirayi Bernard Tongoona, Agyemang Danquah, et al. "Genetic Analysis of Agronomic and Quality Traits from Multi-Location white Yam Trials using Mixed Model with Genomic Relationship Matrix." Global Journal Of Botanical Science 10 (August 4, 2022): 8–22. http://dx.doi.org/10.12974/2311-858x.2022.10.02.

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Traits that define the suitability of a crop for production and consumption are often assessed and predicted to identify superior genotypes for commercial deployment. This study assessed genetic parameter estimates and prediction for 25 agronomic and quality traits in 49 white yam clones. It employed best linear unbiased prediction (BLUP) in a mixed model analysis using genomic relationship matrix derived from 6337 Diversity Array Technology (DArT) molecular markers, multivariate technique of the principal component and canonical discriminant analysis with BLUP predicted values to select key t

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10

E.I., Moyin –. Jesu. "USE OF PIGEON PEA (Cajanus cajan L) AS SOIL AMENDMENT FOR THE GROWTH, LEAF CHEMICAL COMPOSITION AND YIELD OF WHITE YAM (Dioscorea rotundata L)." Continental J. Agricultural Science 2 (August 7, 2008): 6–17. https://doi.org/10.5281/zenodo.839611.

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An experiment was carried out to investigate the use of pigeon pea (<em>Cajanus cajan</em>) as soil amendment for the growth and yield of white yam (<em>Discorea rotundata L</em>) between 1999 and 2002 at Akure in the rainforest zone of Nigeria. There were four treatments namely; NPK 15 -15 -15 fertilizer applied at 300kg/ha, poultry manure at 6t/ha, pigeon pea planted at two seeds per hole at spacing of 1m x 0.5m between rows of yam plots (soil amendment) and a control (no fertilizer). The treatments were arranged in a randomized complete block design (RCB) and replicated five times. The init

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SUJA, G., P. SUBRAMANIAN, R. SUREKHA, D. JAGANATHAN, C. LINTU MARIA, and RAKHI K. RAJ. "Organic management for yams (Dioscorea spp.) intercropped in coconut (Cocos nucifera) plantation: Evidences from a validation trial in the coastal humid tropics of Kerala, India." Indian Journal of Agricultural Sciences 92, no. 8 (2022): 966–69. http://dx.doi.org/10.56093/ijas.v92i8.98705.

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A field experiment was conducted under Network Project on Organic Horticulture during 2015–17 (April-January) at ICAR-Central Plantation Crops Research Institute (ICAR-CPCRI), Kasaragod, to validate the ICAR-CTCRI developed organic farming technologies in yams under intercropping in an organically raised mature coconut garden (>48 years). Three species of Dioscorea [(greater yam (D. alata), lesser yam (D. esculenta) and white yam (D. rotundata)] were tested under four production systems, viz. traditional, conventional, integrated and organic, and replicated thrice in split plot design in a

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12

Nwinyi, S. C. O., and W. O. Enwezor. "Evaluation of Fertilizer Placement Methods for White Yam (Dioscorea rotundata)." Experimental Agriculture 21, no. 1 (1985): 73–78. http://dx.doi.org/10.1017/s0014479700012278.

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SUMMARYFour fertilizer placement methods (ring, sideband, broadcast and furrow) applied ten weeks after planting were compared in nine experiments to determine the best method for fertiliza- tion of white yam (Dioscorea rotundata). Significant yield differences due to the treatments were observed at Mbato, Umudike and Igbariam in 1980 and at Nsukka and Igbariam in 1981. Best yields overall were obtained with the sideband method, followed by broadcast, ring and furrow in that order. However, man-days taken to fertilize one hectare by ring, sideband, furrow and broadcast methods were 11.2, 10.9,

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13

Olatunji, Alice Adenike, Andrew Saba Gana, Kehinde D. Tolorunse, Paterne A. Agre, Patrick Adebola, and Asrat Asfaw. "Agronomic Performance and Yield Stability of Elite White Guinea Yam (Dioscorea rotundata) Genotypes Grown in Multiple Environments in Nigeria." Agronomy 14, no. 9 (2024): 2093. http://dx.doi.org/10.3390/agronomy14092093.

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Yam (Dioscorea spp.) is a main staple tuber crop in Nigeria and the West African region. Its performance is determined by genotypes and also the environment of growth. This study assessed the agronomic performance and yield stability of elite white yam (Dioscorea rotundata) genotypes across diverse Nigerian environments. A total of 25 genotypes were evaluated at three locations in two consecutive growing seasons, 2022 and 2023, for fresh tuber yield, disease resistance, and tuber quality traits. The genotype’s performance and stability for the measured traits were assessed using various analyt

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14

Okpe, Alex Ochai, Francis Agodichi Nkaa, Inyang Joshua Benjamin, Victor Ahaoma Okwu, Fredrich Oge Okpaga, and Pauline Tosin Ojoawa. "Field evaluation of selected hybrid Dioscorea rotundata Poir (white yam) for tuber yield in two selected locations in South-eastern Nigeria." Bio-Research 22, no. 3 (2024): 2506–12. https://doi.org/10.4314/br.v22i3.9.

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Diascorea rotundata Poir (yam) is a primary staple food for many Nigerians, and the country produces the highest percentage of the crop in the world. Its efficiency is influenced by both genotypic traits and environmental factors. The experiment was laid out in randomized complete block design (RCBD) with nine treatments of yam genotypes and three replications to evaluate tuber yield of the nine genotypes across two locations in one growing season. Propagation was done by cutting each tuber into several pieces of approximately 150g each. The study was carried out at the National Root Crops Res

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15

Kayode, G. O. "Effects of NPK Fertilizer on Tuber Yield, Starch Content and Dry Matter Accumulation of White Guinea Yam (Dioscorea rotundata) in a Forest Alfisol of South Western Nigeria." Experimental Agriculture 21, no. 4 (1985): 389–93. http://dx.doi.org/10.1017/s0014479700013211.

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SUMMARYField trials designed to investigate the effects of nitrogen, phosphorus and potassium on the yield, starch and dry matter content of white guinea yam were conducted over a four year period in south western Nigeria. The optimum level of nitrogen for successful production of white guinea yam was 35 kg ha−1 in a forest Alfisol that had been under cultivation for at least two years. Nitrogen, phosphorus and potassium had no significant effect on starch content, but large applications of phosphorus and potassium significantly decreased dry matter accumulation.

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16

Loko, Yêyinou Laura Estelle, Charlemagne D. S. J. Gbemavo, Paterne A. Agre, et al. "White Guinea yam (Dioscorea rotundata Poir.) landraces trait profiling and setting benchmark for breeding programs in the Republic of Benin." PLOS ONE 17, no. 8 (2022): e0273043. http://dx.doi.org/10.1371/journal.pone.0273043.

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To meet the high demand for white Guinea yam, there is a need to develop and release improved varieties to farmers. Unfortunately, low rate of adoption of most of the improved yam varieties by both producers and consumers was observed. Information regarding agronomic characteristics and food qualities of popular white Guinea yam landraces with high market value are not available to establish minimum standards to be considered by breeding programs. To fill this gap, surveys using rural appraisal tools were carried out in 20 villages and 16 markets throughout Benin. Data on the agronomic perform

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Danquah, Eric Owusu, Stella A. Ennin, Joseph N. L. Lamptey, and Patricia P. Acheampong. "Staking Options for Sustainable Yam Production in Ghana." Sustainable Agriculture Research 4, no. 1 (2014): 106. http://dx.doi.org/10.5539/sar.v4n1p106.

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<p>The study evaluated staking options to address the problem of deforestation for sustainable yam production in the Forest and Forest-Savannah Transition zones of Ghana. A split-plot design with three yam varieties (Dente, Water Yam and TDR95/19177 line) and three staking options (No staking, Vertical staking and Trellis with 50% and 30% number of vertical stakes for 2012 and 2013 respectively) as main plots and subplots respectively were used. Results revealed a significant (<em>P</em> <span style="text-decoration: underline;">&lt;</span> 0.05) interaction b

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18

Bassey, E., and U. Akpan. "Evaluation of Guinea White Yam (Dioscorea rotundata Poir.) for Yield and Yield Components in Nigeria." American Journal of Experimental Agriculture 8, no. 4 (2015): 216–23. http://dx.doi.org/10.9734/ajea/2015/16496.

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Emede, T. O., and M. E. Ikpen. "VARIATION, HERITABILITY AND SELECTION RESPONSE OF SEVERAL CHARACTERS IN WHITE YAM (dioscorea rotundata poir)." Nigerian Journal of Life Sciences (ISSN: 2276-7029) 3, no. 1 (2013): 34–41. http://dx.doi.org/10.52417/njls.v3i1.104.

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Phenotypic and genotypic coefficients of variation, heritability, expected genetic gain and selection response were estimated for several agronomic characters among 40 selected clones of white yam. Three hybrid varieties (89-02565, H-2665, 89-2677) were included in the study as checks. Significant mean squares were observed in days to emergence, vine length, spininess, number of vines, and number of tubers, tuber length, tuber girth, tuber yield per hill, fresh tuber yield, and dry tuber yield among the selected 40 clones. Among the selected clones, fresh tuber yield varied from a minimum of 1

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Suja, G., A. N. Jyothi, G. Byju, et al. "Organic management fosters yield, soil health and profit in dwarf white yam." Indian Journal of Horticulture 77, no. 1 (2020): 140. http://dx.doi.org/10.5958/0974-0112.2020.00015.8.

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UNAMMA, R. P. A., and I. O. AKOBUNDU. "Effects of tropical weeds on yield in white yam (Dioscorea rotundata Poir)." Weed Research 29, no. 1 (1989): 1–6. http://dx.doi.org/10.1111/j.1365-3180.1989.tb00833.x.

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22

Eruola, Abayomi. "Response of yam varieties to soil moisture regime in Southwestern Nigeria." Italian Journal of Agrometeorology, no. 2 (December 27, 2021): 3–14. http://dx.doi.org/10.36253/ijam-1324.

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A field experiment was conducted on varietal response of white yam to moisture regime in Abeokuta. The experiment comprised three varieties of yam (Efuru, Ise-osi and Oniyere), three mulching options (grass, polythene and unmulched), and two planting dates (early and late). Treatments were replicated three times using RCBD lay-out. Model for selecting planting date involved relating potential evapotranspiration (PE) to precipitation (P) in the form of 0.1PE<P < 0.5PE, partitioned for attaining optimal planting date into early {T1= Σ(P-0.1PE) ≤ 0} and late {T2 = Σ(P-0.5PE) ≤ 0}, respectiv

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NWAOGUALA, Nwabueze C., and Kolawole E. LAW-OGBOMO. "Comparative Effect of Poultry and Swine Manures on the Performance of White Guinea Yam (Dioscorea rotundata Poir) in an Ultisols Environment." Notulae Scientia Biologicae 10, no. 4 (2018): 516–21. http://dx.doi.org/10.15835/nsb10410393.

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White Guinea yam (Dioscorea rotundata Poir) is an important staple food in a number of African countries, including Nigeria and Ghana. However, the tuber yield in these areas is below its potential yield. The most probably constraint to low tuber yield is the low soil nutrient status. A field trial was conducted at the Experimental Farm of the Department of Crop Science, Faculty of Agriculture, University of Benin, Benin City, Nigeria, between April and November 2016 and 2017, to evaluate the effect of poultry and swine manures on the growth and tuber yield of white Guinea yam (D. rotundata) i

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Neina, Dora. "Ecological and Edaphic Drivers of Yam Production in West Africa." Applied and Environmental Soil Science 2021 (June 3, 2021): 1–13. http://dx.doi.org/10.1155/2021/5019481.

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Yam is an important food and cash crop in West Africa (the yam belt) whose production is traditionally nonsedentary due to its substantial nutrient demand. Population growth, urbanization, and existing soil degradation have made nonsedentary farming virtually impossible. Despite the numerous research invested in yam production within and outside the yam belt, some gaps remain to be filled owing to changing climate events and global developments. Alarmingly, the yam belt is facing sharp yield declines despite increasing production areas. The key edaphic and ecological drivers of yam production

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MORSE, S., N. McNAMARA, and M. ACHOLO. "Potential for clean yam minisett production by resource-poor farmers in the middle-belt of Nigeria." Journal of Agricultural Science 147, no. 5 (2009): 589–600. http://dx.doi.org/10.1017/s0021859609008740.

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SUMMARYYam minisett technique (YMT) has been promoted throughout West Africa since the 1980s as a sustainable means of producing clean yam planting material, but adoption of the technique is often reported as being patchy at best. While there has been much research on the factors that influence adoption of the technique, there have been no attempts to assess its economic viability under ‘farmer-managed’ as distinct from ‘on station’ conditions. The present paper describes the results of farmer-managed trials employing the YMT (white yam: Dioscorea rotundata) at two villages in Igalaland, Kogi

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Tasie, C. M., G. I. Wilcox, A. E. Kalio, and M. E. Igilar. "An evaluation of farmers’ adoption of yam minisett technology in Agricultural Zone 3, Rivers State, Nigeria." Journal of Agricultural Science and Practice 6, no. 1 (2021): 13–18. http://dx.doi.org/10.31248/jasp2020.245.

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The study investigated farmers’ adoption of yam minisett technology in Agricultural Zone 3, Rivers State, Nigeria. The objectives of the study were to examine farmers’ level of awareness of yam minisett technology in the study area, to access the extent of adoption of yam minisett production technique in the study area, examine the constraints to adoption of yam minisett technology in the study area and to determine the influence of yam minisett utilization on the yield of yam in the study area. The study adopted a survey research design. A sample of 360 farmers was selected using random sampl

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Saffa, Musa Decius, Francess Sia Saquee, Prince Emmanuel Norman, et al. "Influence of Field and Storage Diseases and Pests on Tuber Yield and Quality of Exotic and Local Yam (Dioscorea spp.) Genotypes." Horticulturae 9, no. 11 (2023): 1183. http://dx.doi.org/10.3390/horticulturae9111183.

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Field and storage trials were conducted to assess the response of exotic and local yam genotypes to major diseases (anthracnose, yam mosaic virus (YMV) and dry rot) and pests (i.e., mealy bug and nematodes) for the identification of parents with desired complementary traits for crossing. The experiment was conducted at the Njala Agricultural Research Centre (NARC) experimental site in Sierra Leone during two cropping seasons, 2020 and 2021. A total of 113 genotypes of yam comprising 15 D. rotundata, 4 D. prahensilis, 7 D. esculenta, 74 D. alata, 7 D. bulbifera, and 4 D. cayenensis were assesse

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Vaishnavi, Vijayan Venugopal, Saminathan Chockalingam, M. R. Suchitra, and Hanmugananth Elayaperumal. "Analysing Indian Yam (Dioscorea) Varieties Based on Starch Viscosity: A Comparative Scientific Study." International Journal of Environmental Sciences 11, no. 8s (2025): 500–504. https://doi.org/10.64252/2m3svv76.

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Background: yam (dioscoreae) stands as a crucial crop, rich in fiber and starch, widely utilized in food and pharmaceutical industries. This research delved into three indian yam cultivars: potato, elephant yam, and cassava. Aim: the aim of the present study is to isolate the starches from potato, elephant yam, and cassava and their viscosity properties. Objective: to isolate starches from potato, elephant and cassava starch by using alkaline extraction. To evaluate the viscosity properties of the isolated starches using brookfield viscometer. Methods and methodology: The three different yams

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A. O., Eruola, Bello N. J., Ufoegbune G. C., and Makinde A. A. "Effect of Variety Selection on Growth,Development and Yield of White Yam in Southwestern Nigeria." International Journal of Agriculture and Forestry 2, no. 3 (2012): 101–4. http://dx.doi.org/10.5923/j.ijaf.20120203.04.

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NORMAN, PE. "ASSESSMENT OF EARLY GENERATION FAMILIES OF WHITE YAM (DIOSCOREA ROTUNDATA) FOR GROWTH AND YIELD PARAMETERS." SABRAO Journal of Breeding and Genetics 56, no. 6 (2024): 2284–94. https://doi.org/10.54910/sabrao2024.56.6.10.

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Nwankwo, I.I.M.*1 Opara E.C. 2. Njoku T.C3 Akinbo O.K. 1. &. Ikoro A.I. 1. "ON-FARM FARMERS' PARTICIPATORY EVALUATION OF THE IMPACT OF POSITIVE SELECTION ON SEED TUBER YAM ( Dioscorea rotundata Poir) PRODUCTION FROM TWO SOURCES IN EBONYI SOUTHEASTERN NIGERIA." GLOBAL JOURNAL OF ADVANCED ENGINEERING TECHNOLOGIES AND SCIENCES 5, no. 8 (2018): 25–33. https://doi.org/10.5281/zenodo.1344386.

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An experiment was carried out with farmer group in Ebonyi State, Southeastern Nigeria, on two hectares of well prepared land with the aid of a tractor and with the aim to find out the impact of positive selection on Dioscorea rotundata seed tuber yam production from two sources in Ebonyi Southeastern Nigeria. The area was divided into Farm A and Farm B.  The yam variety used was white yam variety Hembakwasa cultivar. Each hectare of land was planted 10000 seed yam tubers obtained from two different sources. Farm A from the markets vendors and Farm B from farmer saved own seed tuber yam in

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SEY, Junias, Germain Mah-Yao ADOLPHE, Dolou Charlotte TONESSIA, Konan Evrard Brice DIBI, and Eric Francis SOUMAHIN. "AGRONOMICCHARACTERISATION OF UNDERGROWTH YAM (DIOSCOREA SP.,) FARMS IN COTE DIVOIRE." International Journal of Advanced Research 13, no. 01 (2025): 224–33. https://doi.org/10.21474/ijar01/20184.

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Yam, the staplefood of the Ivorian people, is the leadingfoodcrop in Cote dIvoire. Today, with the expansion of perennialcrops, especially rubber, yamsface the problem of a scarcity of arable land, whichthreatensfoodsecurity. To solve thisproblem, farmers are increasinglygrowingundergrowingyams as part of theirperennialcrops. This studyaims to characterize understory yam production systems in Cote dIvoire. To do this, data wascollectedfrom 127 understory yam producers in four main perennialcropregions (Centre/Centre-East, East, West and South-West). The studyshowedthat the main systemspractise

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Islam, Md Tariqul, Rais Uddin Chowdhury, Rozina Afroz, Sajia Rahman, and Md Mamtazul Haque. "Characterization and Maintenance of Yam (Dioscorea Spp.) Germplasm." Bangladesh Journal of Agricultural Research 36, no. 4 (2012): 605–21. http://dx.doi.org/10.3329/bjar.v36i4.11748.

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Three experiments were conducted with 60 germplasm accessions of yam (Dioscorea spp.) at Plant Genetic Resources Centre of BARI for characterization and conservation of germplasm. Fifty-nine germplasm accessions of D. alata L. and one accession of D. bulbifera L. from different districts of Bangladesh were used. Clockwise twining direction was found in D. bulbifera and anti-clockwise twining direction was exhibited in all D. alata germplasm accessions. Potato like aerial tuber was found in D. bulbifera. Round, oval, elongate, flattened to irregular aerial tuber shape were found. Grayed-brown,

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Law-Ogbomo, KE, and AU Osaigbovo. "Effects of plant density and npk application on the growth and yield of white guinea yam (Dioscorea rotundata Poir) in a forest zone of Nigeria." African Journal of Food, Agriculture, Nutrition and Development 14, no. 66 (2014): 9404–17. http://dx.doi.org/10.18697/ajfand.66.13795.

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Studies were conducted at Evboneka, Edo State, Nigeria in a forest zone to examine the effect of increasing plant population and NPK application on the growth and tuber yield of Dioscorea rotundata (Poir) cv “Obiaoturugo”. This study involved three trials. The first was conducted in 2010 involving five plant densities (10000, 13333, 17778, 20000 and 266667 plants per hectare (pph)) laid in a randomized complete block design (RCBD) and replicated four times. The second trial was conducted in 2010 involving five NPK application rate (0, 100, 200, 300 and 400 kg NPK 15:15:15 ha-1) using RCBD and

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Dwamena, Harriet Achiaa, Kassim Tawiah, and Amanda Serwaa Akuoko Kodua. "The Effect of Rainfall, Temperature, and Relative Humidity on the Yield of Cassava, Yam, and Maize in the Ashanti Region of Ghana." International Journal of Agronomy 2022 (January 24, 2022): 1–12. http://dx.doi.org/10.1155/2022/9077383.

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This study examined the consequences of changes in minimum temperature, maximum temperature, relative humidity, and rainfall on the yields of maize, cassava, and yam per hectare of land in the Ashanti Region of Ghana. Correlation analysis of each climatic condition on the yield of each crop per hectare of land revealed that each of the climatic conditions was significant in predicting the crop yields. Separate multiple linear regression models were obtained for crop yield per hectare of land under all the climatic conditions. The regression models showed that an increase in maximum temperature

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Ikeh, Angus Onwudiwe, and Nyaudoh Ukpabio Ndaeyo. "Evaluation of Yield and Resistance Effect of Some Yam Genotypes (Dioscorea rotundata Pior) to Pest Attack at Harvest in Uyo, Southeastern Nigeria." American Journal of Agricultural Science, Engineering and Technology 5, no. 2 (2021): 113–20. http://dx.doi.org/10.54536/ajaset.v5i2.78.

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Two years study was carried to assess level of resistance to yam beetle and termite attack by some yam genotypes in Uyo, southeastern Nigeria. The experiment was laid out in randomized complete block design replicated three times. The five yam genotypes tested for yam beetle and termite attack at harvest were; TDr 95/19127, 95/18894, 95/19531, 75/1/2 and Uyo popular local variety eteme. The results showed variations in yield and susceptible to termite and beetle attack at harvest. The TDr 75/1/2 had highest yield 30.41 and 29.75t/ha, followed by TDr 95/18894, 28.86 and 27.93t/ha in 2008 and 20

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Ikeh, A. O., and N. U. Ndaeyo. "EVALUATION OF YIELD AND RESISTANCE EFFECT OF SOME YAM GENOTYPES (DIOSCOREA ROTUNDATA PIOR) TO PEST ATTACK AT HARVEST IN UYO, SOUTHEASTERN NIGERIA." American Journal of Agricultural Science, Engineering and Technology 5, no. 2 (2021): 113–20. https://doi.org/10.5281/zenodo.5456154.

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<strong>ABSTRACT</strong> Two years study was carried to assess level of resistance to yam beetle and termite attack by some yam genotypes in Uyo, southeastern Nigeria. The experiment was laid out in randomized complete block design replicated three times. The five yam genotypes tested for yam beetle and termite attack at harvest were; TDr 95/19127, 95/18894, 95/19531, 75/1/2 and Uyo popular local variety <em>eteme. </em>The results showed variations in yield and susceptible to termite and beetle attack at harvest. The TDr 75/1/2 had highest yield 30.41 and 29.75t/ha, followed by TDr 95/18894,

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Ikeh, Angus Onwudiwe, and Nyaudoh Ukpabio Ndaeyo. "Evaluation of Yield and Resistance Effect of Some Yam Genotypes (Dioscorea rotundata Pior) to Pest Attack at Harvest in Uyo, Southeastern Nigeria." American Journal of Agricultural Science, Engineering, and Technology 5, no. 2 (2021): 113–20. https://doi.org/10.54536/ajaset.v5i2.78.

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Two years study was carried to assess level of resistance to yam beetle and termite attack by some yam genotypes in Uyo, southeastern Nigeria. The experiment was laid out in randomized complete block design replicated three times. The five yam genotypes tested for yam beetle and termite attack at harvest were; TDr 95/19127, 95/18894, 95/19531, 75/1/2 and Uyo popular local variety <em>eteme. </em>The results showed variations in yield and susceptible to termite and beetle attack at harvest. The TDr 75/1/2 had highest yield 30.41 and 29.75t/ha, followed by TDr 95/18894, 28.86 and 27.93

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Dibi, Evrard Brice K., N’Guessan Kouame, Emmanuel K. N’Goran, et al. "Response of the Yam Variety Krengle (Dioscorea rotundata) to Organo-mineral Fertilisation at Bouaké in Central of Côte d’Ivoire." Journal of Agricultural Science 13, no. 6 (2021): 123. http://dx.doi.org/10.5539/jas.v13n6p123.

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The decline in yam productivity due to the lack of arable land and impoverished soils forces farmers to use fertiliser. The fertilisers used are mineral, organic or organo-mineral. A study of these fertilisers has been carried out to propose to the farmers a dose or combination that can improve their yield. Thirteen (13) fertilisers obtained from the combination of mineral fertiliser (NPK 15-15-15) and composted cow or poultry manure were tested on the yam variety Krengle in a 3 replicate randomized complete block design. The experiment was conducted over two (2) campaigns at Bouake in Central

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Pelemo, Olugboyega Success, Ossai Chukwunalu Okolie, Amudalat Bolanle Olaniyan, et al. "Effects of Variety and Sett Weights on Sprout Emergence and Seed Tuber Yield in Dioscorea alata L. and Dioscorea rotundata Poir." Crops 5, no. 3 (2025): 38. https://doi.org/10.3390/crops5030038.

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Yam is a staple crop in Africa that is constrained by its low multiplication rate. This results in a short supply of seed tubers, which is a challenge to increased production. This study assessed the influence of different minisett weights (10, 20, 30, 40, and 50 g) on tuber production and seed categorization in twelve Dioscorea rotundata and four Dioscorea alata varieties over two planting seasons in a Randomized Complete Block Design (r = 3). The yield parameters were collected and analyzed using ANOVA. The effects of varieties, the minisett weight (SW), and the variety × SW interaction were

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Whedie, Boafo Osei, Gurmu Mesay Yami, Seloame Tatu Nyaku, et al. "Yam Nematodes as Production Constraints in Ghana: A Socio-Economic Perspective." Sustainability 17, no. 2 (2025): 482. https://doi.org/10.3390/su17020482.

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Yam (Dioscorea spp.) has been a prominent food and cash crop for most farmers in the yam production areas of Ghana, with the sales of yam in both domestic and international markets contributing significantly to the economy of the country. However, yam production by smallholder farmers is constrained by several challenges, including postharvest loss resulting from yam nematodes. This study conducted field surveys across seven districts across Ghana to collect data from randomly selected 150 yam farmers to investigate the status of nematode infestation, management practices and other socio-econo

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OLASANTAN, F. O. "EFFECT OF POPULATION DENSITY AND SOWING DATE OF PUMPKIN ON SOIL HYDROTHERMAL REGIME, WEED CONTROL AND CROP GROWTH IN A YAM–PUMPKIN INTERCROP." Experimental Agriculture 43, no. 3 (2007): 365–80. http://dx.doi.org/10.1017/s0014479707004942.

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Pumpkin (Cucurbita maxima) is used for live mulch and edible apical shoots, seeds and fruits, and requires that a strategy for using it as ground cover in intercropping with food crops be developed while sustaining reasonable apical and fruit yields. Field experiments were conducted in 1999–2001 to investigate the effects of population density (5000, 10 000 and 15 000 plants ha−1) and sowing date (March, April and May) of pumpkin on the soil hydrothermal regime, earthworm casts, weed control, and crop growth and yields in a Yam–pumpkin intercrop. Growing pumpkin between yam mounds reduced maxi

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TSCHANNEN, A. B., F. ESCHER, and P. STAMP. "POST-HARVEST TREATMENT OF SEED TUBERS WITH GIBBERELLIC ACID AND FIELD PERFORMANCE OF YAM (DIOSCOREA CAYENENSIS-ROTUNDATA) IN IVORY COAST." Experimental Agriculture 41, no. 2 (2005): 175–86. http://dx.doi.org/10.1017/s0014479704002455.

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Tubers of white yam (Dioscorea cayenensis-rotundata) are often cut into segments for planting, so-called setts, whose weight and quality strongly influence yield. The effect of a post-harvest gibberellic acid treatment or manual desprouting of seed tubers on the quality of setts was investigated in a combined storage and field experiment over two years in central Ivory Coast. Although post-harvest losses were slightly reduced after four months of storage by both treatments, this had no effect on tuber yield. However, emergence and yield were significantly influenced by both the sprouting state

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Ajayi, F. A., H. S. Umar, E. Sheyin, et al. "Storage Practices, Incidence and Economic Losses Caused by the Yam Scale Insect, Aspidiella Hartii Cockerell in Nasarawa State, Nigeria." Nigerian Journal of Entomology 37, no. 1 (2021): 37–53. http://dx.doi.org/10.36108/nje/1202/73.0140.

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Yam (Dioscorea species) is an annual root-tuber crop with social and economic significance in terms of food security, cash returns and human health, which has social and economic importance in terms of food, cash and medicine. Insect pests present major constraints to production, storage and marketing resulting in yield and revenue reduction, and deterioration of tuber quality in storage. This study was thus designed to assess yam storage practices by the farmers and the prevalence and economic impacts of the yam scale insect, Aspidiella hartii in selected locations of Nasarawa state, Nigeria.

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Baba, K. C., Aliyu, Y. Y., Adedeji, S. O., Bwala, A. M., and Umar, A. "PROFITABILITY OF YAM PRODUCTION IN PAIKORO LOCAL GOVERNMENT AREA OF NIGER STATE, NIGERIA." Journal of Agripreneurship and Sustainable Development 4, no. 2 (2021): 26–33. http://dx.doi.org/10.59331/jasd.v4i2.205.

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The study examined the profitability of yam production among small-holder yam farmers in Paikoro Local Government Area of Niger State. Primary data were collected from 90 yam farmer’s selected using simple random sampling technique. The data were collected with the aid of a well-structured questionnaire and oral interview Data collected were analyzed using descriptive statistics and budgetary techniques. The results of the socio-economic characteristics shows that majority (50%) of yam farmers were male, within the age range of 46- 55 years. Majority of the farmer had farm size less-than 1 hec

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Asante, Bright Owusu, Jonas Osei-Adu, Kingsley Osei, Stella Ama Ennin, Beatrice Aighewi, and Monica Opoku. "Awareness and adoption of positive selection technology among yam farmers in West Africa." International Journal of Social Economics 48, no. 9 (2021): 1372–89. http://dx.doi.org/10.1108/ijse-07-2020-0474.

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PurposeThis paper aims to investigate how awareness influences the adoption of positive selection (PS) technology among smallholder yam farmers in West Africa. PS has the potential of increasing yield and reducing disease incidence and severity in yam production.Design/methodology/approachThis paper applies the average treatment effect (ATE) methodology to estimate the rates of awareness and adoption of the PS technology and associated factors using data from 678 smallholder seed yam farmers in Ghana and Nigeria.FindingsThe results indicate that the actual adoption rates of PS technology are 5

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Hartati, Lilis, Mohamad Haris Septian, Noor Alif Fitria, Rahma Wulan Idayanti, and Mikael Sihite. "Inulin Extraction from Different Types of Tubers in Magelang District." JURNAL ILMIAH PETERNAKAN TERPADU 11, no. 1 (2023): 1. http://dx.doi.org/10.23960/jipt.v11i1.p1-12.

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This study aimed to determine the levels and characteristics of inulin contained in various types of tubers in Magelang district. The samples used were honey sweet potato (Ipomoea batatas L.), purple sweet potato (Ipomoea batatas L.), white sweet potato (Ipomoea batatas L.), gadung (Dioscorea hispida), yam (Dioscorea alata L.), canna (Canna edulis Ker.), and arrowroot (Maranta arundinacea). The variables observed were yield, inulin content, inulin production, water content of the yield, yield solubility, and the degree of acidity (pH) of the yield. The research results obtained from 7 tubers,

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Iseki, Kohtaro, and Ryo Matsumoto. "Effect of seed sett size on sprouting, shoot growth, and tuber yield of white guinea yam (Dioscorea rotundata)." Plant Production Science 23, no. 1 (2019): 75–80. http://dx.doi.org/10.1080/1343943x.2019.1667835.

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Law-Ogbomo, K. E., and S. U. Remison. "Influence of minisett sizes on dry matter accumulation and fresh tuber yield of white Guinea yam (Dioscorea rotundata)." Annals of Applied Biology 155, no. 2 (2009): 201–6. http://dx.doi.org/10.1111/j.1744-7348.2009.00330.x.

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Mondo, Jean M., Géant B. Chuma, Henri M. Matiti, et al. "Crop calendar optimization for climate change adaptation in yam farming in South-Kivu, eastern D.R. Congo." PLOS ONE 19, no. 9 (2024): e0309775. http://dx.doi.org/10.1371/journal.pone.0309775.

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The traditional crop calendar for yam (Dioscorea spp.) in South-Kivu, eastern Democratic Republic of Congo (DRC), is becoming increasingly inadequate given the significant climatic variability observed over the last three decades. This study aimed at: (i) assessing trends in weather data across time and space to ascertain climate change, and (ii) optimizing the yam crop calendar for various South-Kivu agro-ecological zones (AEZs) to adapt to the changing climate. The 1990–2022 weather data series were downloaded from the NASA-MERRA platform, bias correction was carried out using local weather

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