scholarly journals Impact of Agroforestry Systems on Mineral Fertility of Soils under Cocoa Trees in Toumodi, Côte D'ivoire

2021 ◽  
pp. 10-22
Author(s):  
N'ganzoua Kouame Rene ◽  
Kouame Amany Guillaume ◽  
Voui Bi Bianuvrin Noel Boue ◽  
Bakayoko Sidiky
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Agroforestry System ◽  
Major Elements ◽  
Mineral Elements ◽  
Agroforestry Systems ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Northern Latitudes ◽  
The Impact

Aims: To evaluate the impact of different agroforestry systems on the mineral fertility of soils under cocoa trees. Place and duration of study: The experiment was conducted in the field from June to August 2020 in three types of cocoa-based agroforestry systems identified in Toumodi (Côte d'Ivoire) between the northern latitudes 6°19'37 and 6°34'51 and the western longitudes 5°19'58 and 5°20'02. in the forest-savanna transition zone Methodology: Agroforestry systems define a method of setting up plantations associating various trees with cocoa trees. The choice of cocoa plantations was guided by the density of trees associated with cocoa trees defining a typology of agroforests (simple, mixed or complex). Thus, in each agroforestry system considered, three delimited plots of 100 m2 were randomly placed to make a floristic inventory of the species encountered and each time to take elementary soil samples in the first horizons at 0-20 cm and 20 - 40 cm depth to constitute the composite samples for chemical analyses in the laboratory. Results: The study identified and recorded floristically, 17 families (Anacardiaceae, Apocynaceae, Arecaceae, Bombacaceae, Caricaceae, Combretaceae, Euphorbiaceae, Invingiaceae, Lauraceae, Meliaceae, Mimosaceae, Moraceae, Musaceae, Myristicaceae, Rutaceae, Sterculiaceae, Verbenaceae) distributed in 27 local plant species of which 55.55% of the species and a density of 55 trees/hectare in SAGS, 70.37% of the species and a density of 155.33 trees/hectare in MAGS and 81.40% of the species 224.33 trees/hectare in CAGS. These arboricultural species introduced or maintained in the plantations are generally species with shade, food, economic or medicinal interests. In terms of the chemical fertility generated, it appears that the contents of major elements and trace elements, as well as the clay-humus complex of the soils under cocoa trees were globally satisfactory and more important in the superficial horizons at a depth of 0-20 cm than in the underlying horizon of 20-40 cm, whatever the type of agroforestry system considered, but much more so in MAGS than in CAGS and SAGS in decreasing order. The different positive (R=0.80) or negative (R=-0.80) correlations established between the mineral elements in the surface horizons contribute to enrich the soil by synergistic or antagonistic effects in the agroforestry systems of Toumodi, Côte d'Ivoire. Conclusion: The study showed that each forest agroforestry system has distinct characteristics that can be summarized mainly by its floristic diversity and density of associated trees. They are all not only preservers of a certain level of biodiversity and chemical fertility of the soils under cocoa trees, but much more so at 0-20cm than at 20-40cm. However, AGM would be more likely to improve production in a sustainable way by its capacity to establish a nutritional balance in the soil. It can be recommended during the establishment of cocoa plantations in Côte d'Ivoire.

Pteroteinon laufella.

2021 ◽  
Author(s):  
Matthew Cock
Keyword(s):  
Cote D'ivoire ◽  
Oil Palm ◽  
Côte D’Ivoire ◽  
Subsequent Development ◽  
Feeding Damage ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
The Impact

Abstract Writing about Zophopetes cerymica (which they considered more common) and P. laufella combined, Mariau and Morin (1974) state that attacks can be on palms of all ages, including young palms recently planted out. At this age, defoliation of the plants delays their subsequent development. Outbreaks on older trees are rarer, and the damage often less important; these attacks are generally localized at the edge of plantations. Mariau et al. (1981) add that the highest fronds are the most often damaged. Herder et al. (1994) refer to regular outbreaks of P. laufella on oil palm in southern Côte d'Ivoire. There are no more substantive reports on the impact of the feeding damage by these hesperiids.

An assessment of the impact of artisanal and commercial gold mining on mercury and methylmercury levels in the environment and fish in Cote d'Ivoire

2019 ◽  
Vol 665 ◽  
pp. 1158-1167 ◽  
Author(s):  
Robert P. Mason ◽  
Zofia Baumann ◽  
Gunnar Hansen ◽  
Koffi Marcellin Yao ◽  
Mariame Coulibaly ◽  
...  
Keyword(s):  
Cote D'ivoire ◽  
Gold Mining ◽  
Côte D’Ivoire ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
The Impact

scholarly journals Distribution, Pathogenicity, and Interactions of Two Strains of Rice yellow mottle virus in Forested and Savanna Zones of West Africa

Plant Disease ◽  
2001 ◽  
Vol 85 (1) ◽  
pp. 59-64 ◽  
Author(s):  
P. N'Guessan ◽  
A. Pinel ◽  
A. A. Sy ◽  
A. Ghesquière ◽  
D. Fargette
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Mottle Virus ◽  
Rice Yellow Mottle Virus ◽  
Yield Losses ◽  
The West ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Yellow Mottle ◽  
The Impact

In Côte d'Ivoire, the S2 strain of Rice yellow mottle virus (RYMV) predominated in the forested zones, including the “rice belt” to the west, in each of the cropping systems where rice was grown. The S1 strain occurred more frequently in the northern Guinean savanna, and only S1 isolates were found further north in the Sahelo-Soudanian zones. In mixed infection, S2 dominated over S1 both in viral capsid and RNA contents under temperature regimes encompassing those observed in savanna and forested zones of Côte d'Ivoire. There was no evidence of interactions in virus accumulation between the West African strains S1 or S2 with the more distantly related East African strain S4. Field trials emphasized the impact of RYMV, which induced yield losses of 40 to 60% in several widely grown cultivars of Oryza sativa indica and O. sativa japonica. We report the high resistance of the O. indica cv. Gigante under field conditions which was apparent with all the S1 and S2 isolates tested. Responses to RYMV infection of several cultivars were isolate dependent. With most differential cultivars, responses were not strain specific, with the exception of the O. japonica cv. Idsa6, in which the S2 isolates always induced higher yield losses than the S1 isolates.

scholarly journals The Issue of Education in Post-Conflict Reconstruction through the Transitional Justice Process: The Case of Côte D’Ivoire

2020 ◽  
Vol 3 (4) ◽  
pp. p141
Author(s):  
ASSAMOI Seraphim Desire
Keyword(s):  
Cote D'ivoire ◽  
Transitional Justice ◽  
Côte D’Ivoire ◽  
Cote D’Ivoire ◽  
Reconstruction Process ◽  
National Education ◽  
Post Conflict ◽  
Côte D'ivoire ◽  
Justice Process ◽  
The Impact

The inclusion of education in post-conflict reconstruction in a transitional justice process goes far beyond physical construction and educational facilities to become part of national educational planning and policy. The issue of education in post-conflict periods is at the level of the national education system in general and of educational policies and strategies in particular. In Côte d’Ivoire, as in other countries emerging from violent conflict, even if the issue of education can be identified in the structural and direct causes of the occurrence of conflicts, it must be recognized that the impact of these conflicts on education remains considerable at different levels. Thus, taking account of its consequences in post-conflict reconstruction in the context of transitional justice is of great interest both for its contribution to economic growth and for the promotion of fundamental human rights and social cohesion. A full involvement of education in the transitional justice process is a real potential for mutual reinforcement in the reconstruction process. Practical synergies between education and transitional justice call for closer collaboration between education and transitional justice actors.

scholarly journals Conflits Fonciers Intercommunautaires Et Fracture Sociale Dans Les Régions Du Guémon Et Du Cavally À L’ouest De La Côte d’Ivoire

2016 ◽  
Vol 12 (14) ◽  
pp. 240 ◽  
Author(s):  
Kouassi N’goran François ◽  
N’drin Beugré Anselme
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Phenomenological Approach ◽  
Cote D’Ivoire ◽  
Social Division ◽  
Migrant Communities ◽  
Côte D'ivoire ◽  
The Social ◽  
Land Disputes ◽  
The Impact

The armed conflict that ravaged Côte d'Ivoire after the post-election crisis in november 2010 was sparked by several factors (land disputes, armed uprising of september 2002, tribal militias conquest of state power). In the regions of Guémon and Cavally that formed the epicenter of the war, intercommunal land disputes were instrumental in the outbreak of the war. These tensions between peasants have long caused confusion in the far west forest and contributed in part to the social division between indigenous and migrant communities. This qualitative study based on the phenomenological approach and firstly analyses the dynamics of these communal land disputes before the post-election crisis of 2010. Then, it situates the impact of these conflicts in the social division between communities.

scholarly journals Evaluation of the Behavior of Cashew Genotypes with Regard to Bacterial Disease in Agroforestry Farms in Northern Côte d'Ivoire

2021 ◽  
pp. 106-117
Author(s):  
Brou Kouassi Guy ◽  
Diarrassouba Nafan ◽  
Doga Dabé ◽  
Oro Zokou Franck ◽  
Leki Konan Bertrand ◽  
...  
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Descriptive Analysis ◽  
Hierarchical Classification ◽  
Severity Index ◽  
Agroforestry System ◽  
Bacterial Disease ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Ascending Hierarchical Classification

Notwithstanding the inflows of currency for the populations who practice it, the cultivation of the cashew tree contributes to strengthening the forestry agrosystem in Côte d'Ivoire. However, this culture, with multiple interests, is confronted with attacks from parasites including bacterial disease. Bacterial disease causes extensive damage to vegetative organs as well as fruits and causes yield losses. The objective of this study is to assess the behavior of cashew genotypes in relation to the severity and incidence of bacterial disease in the context of agroforestry production in Côte d'Ivoire. To achieve this objective, 1.200 branches were observed to assess the tolerance or sensitivity of 30 cashew trees in agroforestry orchards of cashew trees in the localities of Korhogo, Sinématiali and Boundiali. These cashew genotypes were selected and geolocated. The factor studied is the cashew genotype, composed of 30 cashew genotypes, with 6 modalities which are the severity index of bacterial disease on leaves, twigs and nuts, the incidence of bacterial disease. bacterial disease on leaves, twigs and nuts. The data collected that are the index of severity of bacterial disease on leaves, twigs and nuts, the incidence of bacterial disease on leaves, twigs and nuts have made the subject to descriptive analysis and PCA. The ascending hierarchical classification (HAC) and multivariate analysis completed the data analysis. The results obtained revealed three groups of cashew trees. Those of group 3 made up of twelve (12) genotypes, namely SYDN, SDYY, SDYN and KBSD coming from the localities of Sinématiali and Korhogo, differ from the others by a weak infection of the nuts (8.67 ± 2.74). The genotypes in this group are more resilient and their development in an agroforestry system could help promote  agroecological management of bacterial disease, improve and intensify agroforestry practices in C. d'Ivoire.

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