Typologie des exploitations agricoles : caractérisation et accès aux services agricoles au Bénin (Afrique de l’Ouest)

Le secteur agricole constitue un levier très important du développement de l’économie béninoise. Il est dominé par la présence d’exploitations agricoles qui mènent plusieurs activités. L’objectif de cette étude était de caractériser ces exploitations agricoles et d’analyser leurs accès aux services agricoles au Bénin. Les données ont été collectées à l’aide des questionnaires et de guide d’entretien auprès d’un échantillon de 4880 exploitions agricoles. L’analyse typologique a été faite à l’aide d’une classification ascendante hiérarchique et d’une analyse en composantes principales. L’analyse du taux d’accès des exploitants agricoles aux services agricoles a été faite grâce aux statistiques descriptives et au calcul de pourcentage dans des tableaux croisés. L’analyse des variances a permis d’analyser les variations des taux d’accès des services agricoles entre les classes d’exploitations agricoles. Les résultats de l’étude ont montré qu’il existe trois catégories d’exploitations agricoles au Bénin. Il s’agit des gros agriculteurs (27,91%), des agriculteurs moyens (21,45%) et les petits agriculteurs qui sont majoritairement représentés (50,64%). L’appartenance à l’un ou l’autre des groupes d’exploitation est déterminée par la superficie des champs, le nombre d’actifs agricoles, l’utilisation de la traction motorisée, de la traction animale, le nombre de têtes de bovins, etc. L’analyse du taux d’accès des exploitations agricoles aux services agricoles a révélé que ces taux varient d’une catégorie d’exploitation à une autre. Cette étude permettra aux décideurs politiques de définir et bien orienter les politiques de recherches développement vers les acteurs du monde rural. The agricultural sector is a very important lever for the development of the Beninese economy. It is dominated by the presence of farms that carry out several activities. The objective of this study was to characterize these farms and to analyze their access to agricultural services in Benin. Data were collected using questionnaires and interview guides from a sample of 4880 farms. The cluster analysis was done using an ascending hierarchical classification and principal component analysis. The analysis of the access rate of farmers to agricultural services was made through descriptive statistics and percentage calculation in cross tables. The analysis of variances was used to analyze the variations in the rates of access to agricultural services between the classes of agricultural holdings. The results of the study showed that there are three categories of farms in Benin. These are large farmers (27.91%), medium farmers (21.45%) and small farmers who are mostly represented (50.64%). Membership in one or another of the farming groups is determined by the area of the fields, the number of agricultural workers, the use of motorized traction, animal traction, the number of heads of cattle. , etc. Analysis of the access rate of farms to agricultural services revealed that these rates vary from one farm category to another. This study will enable political decision-makers to define and properly orient development research policies towards actors in the rural world.

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

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.

Evaluating Insects as Bioindicators of the Wetland Environment Quality (Arid Region of Algeria)

The wetland of Naâma situated in the arid region of Alegria offers an important fauna and flora diversity due to its geographical location it constitutes the main resting place in North Africa for migratory birds. Insects are used as bioindicators, due to their sensitivity to environmental conditions which, because of their ecological peculiarities, gives information on the characteristics of terrestrial and aquatic environments. The aim of this study is to know and specify the entomofauna bio-indicator of the quality of the aquatic environment of the wetland Naâma (SW Algeria). The study carried out in the wetland from September 2017 to September 2020. Benthic insects were sampled according to the IBGN protocol (Standard Global Biological Index). Study and statistical analysis of insects communities was based by the use of the structural and statistical index, Correspondence factor analysis (CFA), and The ascending hierarchical classification (C.H.A). The results show that the collected insect 51 species, belong to 9 orders, The Coleoptera order is the most represented with 11 species, followed by the Odonata with six species, Lepidoptera ranks third with five species followed by Diptera with 03 species. The various indicators used, namely the specific richness (51 species), the Shannon index (1.01 bits), and fairness (0.56) show that this environment is characterized by significant fauna biodiversity. The study of the hydro-biological quality of the water courses of this site, assessed by the IBGN method showed a good hydro-biological quality with moderate pollution (IBGN = 14). This pollution is precisely marked by the requirement of Ephemeroptera and the disappearance of Plecoptera. These results lay the foundation for any biomonitoring action of the ecological quality of the waters of this wetland.

Identification of Agromorphological Determinants Favoring the Propagation of Bacterial Disease in Agroforestry Farms of Cashew Trees in Côte d'Ivoire

In Côte d'Ivoire, cashew cultivation faces several health obstacles. Among these problems, bacteriosis causes extensive damage to twigs, leaves and fruits, lowers the quality of crops and causes yield losses. The spread of this disease would be under the determination of the morphological characters of the cashew tree. The objective of this study is to search for agro-morphological determinants that influence the spread of bacteriosis in agroforestry systems in Côte d'Ivoire. To achieve this objective, 30 cashew trees spread across 26 agroforestry cashew orchards in the Korhogo, Sinématiali and Boundiali departments were chosen and geolocated. The study factor is the clone, consisting of 30 cashew genotypes, with 13 modalities. The collected data was subjected to descriptive analysis, correlation test, ACP and ascending hierarchical classification (CAH). The results obtained showed that the size and leaf areas and size of cashew trees are determinants that promote the spread of bacteriosis in these 30 cashew genotypes. Following this result, the ascending hierarchical classification (CAH) made it possible to screen the genotypes into three groups. These results should contribute to the agroecological management of bacteriosis, to enhance and intensify agroforestry cropping systems in Côte d'Ivoire.

Analyzing Economic Sustainability of Market Gardening and Rice Farms in Southwest Benin under FAFA Project

The issue of agricultural sustainability remaining a topical concern. While agriculture being an important sector for the development of world economies. It has noted that implementing farming sustainably for a better contribution in the next generation economic development needed. The main purpose of this paper is to analyze the economic sustainability of the rice farms and market gardening benefiting from the FAFA MC project in the Southwest juxtaposed departments in Benin. Specifically, it is first of all a question of assessing, with regard to the two types of farms, which type of farming is the most sustainable. Next, to see whether rice farms are more sustainable than market gardening farms; and finally, to highlight the relationship between economic sustainability and environmental and social sustainability. The data used where obtained from FAFA MC database (2012). Finally, a data of 48 farms were used in the analysis. The analysis techniques have consisted of three steps these are: descriptive analysis, the principal component analysis applied and an ascending hierarchical classification applied. The analysis of data supported by SPSS 2.0, Excel 2013 and SPAD 5.5 software package. To understand the economic sustainability of the farms, the sustainability indicators methodology of IDEA was employed. Overall, it emerges from the analysis of results that the farms considered have limited economic sustainability (a score of 38.25 / 100); group farms prove to be more economically sustainable than individual farms and vegetable farms are more economically sustainable compared to rice farms. So, it seems important to encourage groupings of individual farmers, to clearly define property rights on agricultural land, to sensitize producers to the application of the principles of sustainable development.

Deterioration of Sexual Health in Cancer Survivors Five Years after Diagnosis: Data from the French National Prospective VICAN Survey

Little is known about cancer survivors’ sexual health (SH)—particularly, from well after diagnosis and in cancers unrelated to sexuality. This study aimed to assess SH deterioration five years after diagnosis. We analyzed data from the French national VIe après le CANcer (VICAN) survey. Six items from the Relationship and Sexuality Scale were used to assess SH. Respondents were grouped according to an ascending hierarchical classification in four clusters: strong, moderate, and weak deterioration or stable (WD, SD, MD, or St). Out of 2195 eligible participants, 57.3% reported substantial SH deterioration as either SD (30.8%) or MD (26.5%), while WD and St accounted for 31.2% and 11.5% of respondents, respectively. Substantial deterioration was reported in all cancer sites (from 27.7% in melanoma to 83.1% in prostate). Treatment type, cancer sequelae, and pain, as well as psychological consequences (depression and anxiety, especially for younger patients) were associated with substantial SH deterioration. The same factors were identified after restricting the analysis to survivors of cancers unrelated to sexuality. Five years after diagnosis, the majority of cancer survivors reported SH deterioration. Interventions should be developed to improve SH regardless of cancer site. Particular attention should be paid to depression and anxiety, especially in younger survivors.

Connaissances endogènes et perception du déficit hydrique liées à la culture du piment (Capsicum spp.) au Togo

Au Togo, la production du piment (Capsicum spp.), légumineuse prisée, reste encore très faible. Afin d’aider à sa promotion, une enquête a été menée dans 20 localités, pour évaluer les contraintes qui y sont liées, la perception paysanne du déficit hydrique et les pratiques endogènes de gestion de l’eau. Au total, 28 contraintes ont été répertoriées dont la plus citée est le déficit hydrique (94,74%). La corrélation entre les localités et les contraintes citées a permis de définir trois groupes de localités dont deux géographiquement homogènes. La région centrale, avec le plus grand nombre de contraintes, connaît également les plus longues durées de poches de sécheresse en pleine saison pluvieuse (2,4 ± 0,75 semaines). En périodes de manque d’eau, les producteurs adoptent diverses pratiques endogènes consommatrices d’eau (irrigation, arrosage) et/ou conservatrices d’humidité (paillage, agriculture sur berge). Aussi, 34 cultivars, sous réserve de synonymie, ont été identifiés, répartis en six groupes suivant une classification ascendante hiérarchique basée sur la forme des fruits. Le cultivar Gboyébéssé est le plus prisé avec un indice de valeur d’importance de 1,22. Ces résultats pourront permettre de mieux planifier les plans d’action des différents acteurs de la filière piment pour une production optimale.Mots clés : Légumes, stress hydrique, pratiques endogènes, contraintes de culture, Togo. English Title: Endogenous knowledges and perception of water deficit related to chilli (Capsicum spp.) cultivation of in TogoIn Togo, the production of chili pepper (Capsicum spp.), estimated vegetable, is still very low. In order to help its promotion, a survey was conducted in 20 areas, to assess the related constraints, the peasant perception of water deficit and the endogenous practices of water management. A total of 28 constraints were identified and the most cited is water deficit (94.74%). Three groups of areas (of which two are geographically homogeneous) emerged after a correlation between areas and constraints. The central region, with the highest number of constraints cited, also has the longest dry pockets in the wet season (2.4 ± 0.75 weeks). In response to periods of lack of water, producers adopt various endogenous water-consuming practices (irrigation, watering) and/or humidity-conserving practices (mulching, riverbank farming). Also, the study identified 34 cultivars if no synonymy, divided into six groups according to an ascending hierarchical classification and based on the pomological characteristics of the fruit. Cultivar Gboyébéssé is the most popular cultivar with a value index of 1.22. These results can be the basis for better action plan of the various stakeholders in the chilli pepper sector for an optimal production.Keywords: Vegetables, water stress, endogenous practices, cultural constraints, Togo.

Dinamica populației principalelor aglomerații urbane din Europa

Dynamics ot the population of the main urban aglomerations in Europe (1980-2019). Using several available databases, all based on official information, the population evolution from the main European urban agglomerations (those with a minimum of 1000 thousand inhabitants) was reconstructed. The period considered was 1980-2019 in order to capture the changes generated by the disappearance of the iron curtain and the totalitarian regimes. The analysis based on the ascending hierarchical classification, carried out in XLSTAT, shows the persistence of strong east-west disparities but also the appearance of disparities, both between the former communist states and in the west of the continent. The generalization of the urban sprawl process, with the agglomeration of the population in the suburban areas was neither uniform nor constant over time. An urban resilience has played an important role, the ability to overcome the systemic crisis induced in the east of the continent by the transition to the market economy or in the west, to adapt to the new knowledge-based economy. Beyond the manifestation of these disparities that seem to be the expression of a historical inertia, a tendency of convergence at the continental level, similar to the one that was manifested in the case of the demographic transition after 1990, is timid.

Phytodiversité et productivité herbacée du futur site de pré-lâché d’autruche d’Afrique du Nord (Struthio camelus camelus L.) dans le Koutous, Niger

L’autruche d’Afrique du Nord (Struthio camelus camelus) communément appelée autruche à cou rouge a disparu à l’état naturel au Niger depuis 2004. Le présent article est une contribution au processus de réintroduction de cette espèce, qui vise à caractériser la végétation du site dénommé « Tchillala » dans le Koutous, site pilote pour le pré-lâché de l’autruche. Les relevés phytosociologiques ont été effectués à l’aide de la méthode sigmatiste d’abondance-dominance de Braun-Blanquet dans 42 placettes de 1000 m² (50 m × 20 m). Dans chaque placette, la coupe de la phytomasse herbacée a été réalisée dans des carrés de rendement de 1 m². Au total, soixante-six (66) espèces réparties en cinquante un (51) genres et vingt-huit (28) familles ont été recensées. La classification hiérarchique ascendante des relevés a permis d’individualiser trois groupements végétaux : le groupement à Acacia tortilis et Tribulus terrestris, le groupement à Balanites aegyptiaca et Zornia glochidiata et le groupement à Leptadenia pyrotechnica et Echinochloa colona. La richesse spécifique de ces groupements végétaux varie de quarante un (41) à soixante-deux (62) espèces. L’indice de diversité de Shannon varie de 4,01 à 3,16 bits et l’indice d’équitabilité de Piélou de 0,56 à 0,67. La productivité moyenne de la phytomasse herbacée des trois groupements est de 0,48±0,17 tonnes de matière sèche par hectare et une capacité de charge moyenne de 0,07±0,02 UBT/ha/an. Les spectres biologiques des groupements montrent une dominance des thérophytes. Quant aux spectres phytogéographiques, ils montrent une dominance des espèces paléotropicales. Ce site possède un potentiel floristique pour faire le pré-lâchage des autruches.Mots clés : Struthio camelus camelus, phytosociologie, productivité, réintroduction, Koutous, Niger English Title: Phytodiversity and herbaceous productivity of the future site of pre-release ostrich of North Africa (Struthio camelus camelus L.) in Koutous, Niger The North African ostrich (Struthio camelus camelus), commonly known as the Red-necked Ostrich, which has been extirpated from Niger since 2004. This article is a contribution to the reintroduction process of this species; aims to characterize the vegetation of the site called "Tchillala" in the Koutous, pilot site for the ostrich pre-release. The phytosociological surveys were carried out using the Braun-Blanquet sigmatism abundance-dominance method in 42 plots of 1000 m² (50 m × 20 m). In each plot, herbaceous phytomass was cut in yield squares of 1 m². A total of sixty-six (66) species divided into fifty-one (51) genera and twenty-eight (28) families were identified. The ascending hierarchical classification of the surveys has shown three plants groups such as Acacia tortilis and Tribulus terrestris group, Balanites aegyptiaca and Zornia glochidiata group and Leptadenia pyrotechnica and Echinochloa colona group. The species richness of these plant groups varies from 62 to 41 species. The Shannon diversity index varies from 4.01 to 3.16 bits and Piélou's equitability index from 0.56 to 0.67. The average productivity of the herbaceous phytomass of the three groups is 0.48 ± 0.17 tonnes of dry matter per hectare and an average carrying capacity of 0.07±0.02 TLU/ha/year. The biological spectra of the groups show a dominance of therophytes. As for phytogeographic spectra, they show a dominance of paleotropical species. This site has a floristic potential to pre-release the individuals of ostrich.Keywords: Struthio camelus camelus, phytosociology, productivity, reintroduction, Koutous, Niger.

Morphometric Characteristics of the Extreme Eastern Algerian Domestic Donkey (Equus asinus)

The aim of this study was to define the morphometric variability of the extreme Eastern Algerian donkeys. The study was carried out from June to December 2018 in El-Tarf, Souk-Ahras, and Tebessa provinces. The study population involved 65 individuals (32 jacks and 33 jennies) between the ages of 3 and 16 years old. In total, 13 body measurements were used, and 5 zootechnical indexes were calculated. The quantitative and qualitative characteristics were studied in order to establish an ethnic and functional classification of this particular subspecies. The qualitative data demonstrated that the coat colour was variable. Bay and greyish colours were dominant with a respective rate of 61.5 % and 38.5 %, respectively. The head, the nose, as well as the eyes contour colours were mainly grey with 52.3 %, 58.5 % and 50.8 % respectively. The partial absence of the coat particularities was observed. The population presented a significate relationship between the quantitative characters (P < 0.05). The donkeys were longilinear, of a rectilinear profile, compact with massive trends. They had a hyper-metric format. The animals are good for meat production. The General Linear Model (GLM) showed that the body measurements were variable by sex and body mass. The principal component analysis (PCA), the multiple correspondence analyses (MCA) and the ascending hierarchical classification (AHC) revealed that the population was composed of 2 clusters representing 4 animal classes. This study was the first report on the phenotypic characterization of donkeys in the extreme Eastern Algerian area, based on corporal measurements. The results indicated the existence of heterogeneity and suggested the possibilities of genetic improvement within the species.