Association between soil organic carbon and calcium in acidic grassland soils from Point Reyes National Seashore, CA.

ABSTRACT: Organo-mineral and organo-metal associations play an important role in the retention and accumulation of soil organic carbon (SOC). Recent studies have demonstrated a positive correlation between calcium (Ca) and SOC content in a range of soil types. However, most of these studies have focused on soils that contain calcium carbonate (pH > 6). To assess the importance of Ca-SOC associations in lower pH soils, we investigated their physical and chemical interaction in the grassland soils of Point Reyes National Seashore (CA, USA) at a range of spatial scales. Multivariate analyses of our bulk soil characterisation dataset showed a strong correlation between exchangeable Ca (Ca_Exch; 5-8.3 c.mol_c kg^-1) and SOC (0.6-4%) content. Additionally, linear combination

SUBMITTER: Rowley MC 

PROVIDER: S-EPMC10457245 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature