Timbe N’Djédanoum^1,, François Ouedraogo², Sayouba Kabre¹, Ibrahim Pafadnam¹, Moussa Dit Corneille Tarpilga², Bétaboalé Naon², Francois Zougmore¹

Soil samples were taken from the 0-20 cm range from three sites in the Hadjer Lamis region. According to the climatology (rainfall and temperature trends) over the last thirty years, Dandi, Mani, and Karal have an arid climate based on the Koppen-Geiger classification. A physico-chemical characterization analysis of these samples gives us the granulometry by sieving according to the NFP18-560(1978) standards in the bottom of the sieves for the different samples, which are as follows: Dandi: 63.4%, Karal: 70.5%, Mani: 2.1%. Mani has a plasticity index (PI) that cannot be measured, while Dandi and Karal have plasticity indices of 4.75 and 21.15 respectively. Using the soil classification table based on PI values, the Dandi soil is sandy and the Karal soil is sandy clay. The results of the chemical analyses reveal that these three soil samples have organic matter contents of 0.655%, 0.617%, and 0.519% respectively, which are not very appreciable, as these soils are poor overall. The pH-water varies between 6.26 (weakly acidic) and 7.64 (slightly alkaline) with an average of 7.72 (neutral), the exchangeable base content is normal for some samples and abnormal for others. The poverty of these soils is undoubtedly because they are arid

arid, climate, physico-chemical, soil, organic matter, fertility