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The study approaches the dynamics of the land use through the evolution of cultivated area and the production of the principal crops, then the impacts of the agricultural activities on the environment and the living conditions of the population. Objective: The total objective of the study was to evaluate the socio-environmental impacts of the agricultural activities in the Communes of Natitingou, Boukombe, Tanguieta and Toucountouna in mountainous area in the North-Western of Atacora in Benin. Methodology and Results: The methods used were the exploratory investigations, the participative diagnoses, the opinion polls and statistical analyses such as the variance according to the test of Tukey and the test of correlation. On the whole, 400 farmers were selected randomly and questioned in eight villages of the four communes using a structured questionnaire to obtain relative data with the numbers of cultures produced on the same piece, with various husbandries, with the use of mineral manures, the adoption of the endogenous and exogenous technical of management and conservation of the fertility of the grounds in the medium. The results showed that agricultural production systems were still extensive and itinerant on slash-and-burn. Crops were established in pure and association between April and December with a pre-eminence of cereals, which accounted for about 52% of the area. Productions were more based on acreage than agricultural intensification. The causes of soil degradation, production, were collected during collective and individual interviews. The impacts of agricultural production were mainly reflected in the disappearance of vegetation cover, the decline in soil fertility and the pollution of certain rivers along which agricultural-dominated activities were carried out. Conclusion and application of results: Some activities such as the use of chemical fertilizers and wildfires have solved problems such as improving agricultural yields and increasing incomes on an ad hoc basis, but they didn’t last. Over the years, these activities have negatively affected the environment and living conditions of the population. The agricultural intensification based on the popularization and the adoption of more productive and environment friendly technologies, easily applicable by the producers, remains one of the strategies to guarantee a durable use of the natural resources.

Impacts socio-environnementaux des activités agricoles en zone de montagnes au Nord-Ouest de l’Atacora au Bénin