Dynamics of 13C and 15N isotopes in fire-affected soils under rotational shifting cultivation in Northern Thailand

Understanding the biogeochemical consequences of fire and land-use history in tropical upland systems is essential for sustainable soil management. We investigated the vertical distribution of stable carbon (δ13C) and nitrogen (δ15N) isotopes in soils under rotational shifting cultivation (RSC) in Northern Thailand. Three fields with distinct land-use histories were analyzed: a continuously fallow site for seven years (CF-7Y), a six-year fallow RSC site (RSC-6Y), and a twelve-year fallow RSC sit