Soil carbon stocks measured directly in each of the nutrient enrichment plots across all of the sites. The treatments included Control (C), Nitrogen (N), Phosphorus (P), Potassium (K), Nitrogen+Phosphorus (NP), Nitrogen+Potassium (PK), Phosphorus+Potassium (PK) and all nutrients combined (NPK). The code used to analyze these data and generate graphs is all included in Supplementary material
