Origin of carbon in agricultural soil profiles deduced from depth gradients of C:N ratios, carbon fractions, δ 13 C and δ 15 N values
Agricultural soils in Germany store 2.54 Pg of organic carbon (C). However, information about how and when this C entered the soils is limited. This study illustrates how depth profiles of organic matter can shed light on different entry paths of organic C. Machine learning was used to explain total…