This dataset has been collected thanks to the long-term partnership with National Park, Wildlife and Plant Conservation Department (DNP), Thailand, which granted the permission for field access, and to the financial, scientific, technical, and/or logistical support of the Multiscale TROPIcal CatchmentS (SNO M-TROPICS; https://mtropics.obs-mip.fr/) critical zone observatory (previously MSEC). The soil samples were taken under different vegetation covers at the long-term observatory catchment Huay Ma Nai in northern Thailand in 2017. This dataset holds some chemical and physical soils properties. Dry combustion analysis (CHN) was used to assess Carbon (C) and Nitrogen (N) concentrations. Fourier-transform infrared (FTIR) spectroscopy was used to measure the signature of the samples in the medium infrared region. Soil analyses have been carried out at the Pôle d’expérimentation et d’analyse des sols et sédiments tropicaux (ALYSÉS). The authors acknowledge the financial support of the Institut de Recherche pour le Développement (IRD).