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This paper focuses on the influence of Acacia senegal on soil and cowpea production (Vigna unguiculata) at the N'Dounga Forest Station (INRAN) through a complete randomized block design. Treatments based on its association with cowpea in isolated trees and planting were applied. Chemical parameters, nitrogen fixation potential, and cowpea production were evaluated under these treatments. The results show an improvement in the chemical property of the soil in the presence of A. Senegal. Since the pH is acidic irrespective of the modality, the analysis of the variance shows a highly significant difference between the control and the other treatments for the water pH (P <0.000 1). Also, the nitrogen fixation potential cowpea was better expressed in his presence. However, the A. Senegal has less influenced the production of cowpea. The yields of pods, seeds, and fodder were reduced compared to the control. This study also revealed the dynamics of mineral elements after harvests, which reassures producers about the sustainability of the tree/crop system.

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The city of Saayi (Say), Niger has played an important role in the regional development of Islam from the early nineteenth century onwards. This paper traces its history and the biography of the founder, using the available written and oral sources, while also describing its role as a contemporary religious centre. The Qur'an is commented on in local languages both in the context of traditional advanced religious education and in Ramaḍān. The intellectual sources, language and ritual dimensions of enunciation of these oral commentaries are analysed, as are the ceremonies specific to Ramaḍān. Although Say was founded by Fulfulde-speaking scholars, reflecting the general cultural and social evolution of the city and its area, for the past 50 years, the Qur'an commentary in the Friday mosque has been given in Songhay-Zarma. While these commentaries are essentially based on recognised Arabic ones, their language makes some reference to the images and concepts of local Songhay-Zarma culture. The linguistic features and substantive content of Songhay-Zarma oral tafsīr are illustrated by two excerpts, each presenting several verses of Sūrat al-Baqara: one is drawn from a full tafsīr collected in Say in 1968, at the initiative of the well-known statesman and man of letters Boubou Hama; the other was collected in the Zarma country in 1905–6.