Soil organic matter formation is controlled by the chemistry and bioavailability of organic carbon inputs across different land uses

Soil organic matter (SOM) formation involves microbial transformation of plant materials various quality with physico-chemical stabilisation via soil aggregation. Land use and vegetation type can affect the litter chemistry bioavailability carbon (OC), consequently influence processing OC into SOM. We used 13C nuclear magnetic resonance (13C NMR) hot-water extraction to assess changes in chemical composition labile fractions during processes from leaf SOM depending on land type. The hot-water-extractable (HWEOC) decreased (43–65 g kg?1) (19–23 (8–16 similar four types: grassland, sugarcane, forest banana. These trends demonstrated uniform converging pathways increasing stability by formation. preferential decomposition decrease (?% di-O-alkyl, O-alkyl methoxyl) (54–69%) (41–43%) confirmed remaining compounds. Despite differences biochemical tissues among types, proportions were across uses. content was higher (7.9%) grassland (5.2%) compared sugarcane (2.3%) banana (3.0%). Consequently, HWEOC per unit weight (2.0 1.2 kg?1 soil, respectively) (0.3 0.4 kg soil?1, respectively). availability is dependent quantity not In conclusion, SOM, as identified NMR, regardless consequently, leads convergence despite diversity sources.