Soil carbon stocks, bulk density, texture, and carbon concentration data from improved Urochloa humidicola pastures and native savannas in the Colombian Llanos

This dataset contains all original field and laboratory measurements used in the manuscript: “Large-scale assessment of the contribution of improved Urochloa humidicola pastures for enhancing soil organic carbon stocks in the Colombian Llanos” (manuscript under peer review). The repository includes:1) Soil organic carbon (SOC) concentration (g kg⁻¹),2) Bulk density (g cm⁻³),3) Soil texture composition (sand, silt, clay %),4) SOC stocks by individual soil layers,5) Total SOC stocks for 0–100 cm,6) Sampling-site coordinates and associated SOC values. All samples were collected across improved Urochloa humidicola pastures of different ages and conventionally burned savannas at Hacienda San José, Vichada, Colombia. These are the same primary data used in the analysis for the manuscript. Only original measurements are included; no intermediate calculations, scripts, or derived datasets are provided. A README file describing each file and variable is included. If these data are used, please cite the manuscript once published.