Volume 6 Article informations Soil organic matter management in coastal oasis Hajer Guebsi a,b, Nissaf karbout a,b, * , Rachid Boukchina c , khaoula Boudabbous b , Faiza Khallfalli a , Habib Bousnina b , Mohamed Moussa a Abstract Farmer’s management practices in arid areas can have profound effects on soil quality. The coastal oasis agrosystem is characterized by a higher density and diversity of vegetation cover that is linked to specific local cropping, land management, and higher soil moisture availability. In Chenini oasis, farmers make an annual addition of the organic matter in the soil. However, this practice is still traditional and usually done without a reasonable study. Thus a wellstudied elaborate become a necessity to improve soil fertility in this conditions. This study is carried out in the oasis of Chenini (governorate of Gabes) to assess the effects of organic matter on the soil chemical properties of oasis and on their fertility. The results obtained from analysis revealed that the Chenini coastal oasis exhibited high soil organic carbon concentrations which reflected on the abundance of macro and micro nutrients. Key words: Costal oasis, degradation, organic matter, Tunisia.