Original ResearchPublished 8 September 2026Depth-stratified soil organic carbon dynamics across forest–cultivation gradients in Nkanu East Watershed, Southeast Nigeria: implications for agroecological managementMartin A. N. Anikwe · Chinyere S. Dan-Chukwu · Emmanuel E. Ikengannyia · Evelyn O. Obidike-UgwuFrontiers in Agronomydoi 10.3389/fagro.2026.1908936