The study presented in this paper consists of an aspect of geotextile utilization in the reinforcement of embankments and retaining walls. Emphasis was placed on the behaviour of the anchorage zone. For this purpose, several pullout tests were carried out with a nonwoven geotextile and two kinds of soil: a dry sand and a damp silt. During all the tests, the movements of soil and fabric were both measured and visualized by an X-ray radiography system. The effects of several parameters, such as the stiffness of geotextile, its anchorage length, the normal stress applied, the type of soil, and their consequences on the entire reinforced mass, such as its deformability and the tension in the geotextile, were studied. Based on these test results, some recommendations for practical design were established concerning the friction angle to take into account for the soil-inclusion, the tensile distribution in the geotextile, and the size of the soil zone influenced by the movement of the reinforcement.