1977/05/01 by D. S. Jenkinson, D. S. JENKINSON, J. H. RAYNER +1 · 1,168 citations
Agricultural and Biological Sciences · Chemistry · #Agronomy #Biology #Biomass (ecology) #Chemistry #Environmental chemistry #Environmental science #Humus #Organic matter #Soil Carbon and Nitrogen Dynamics #Soil organic matter #Soil science #Soil water #Total organic carbon
paper · doi:10.1097/00010694-197705000-00005
published in Soil Science 123(5), 298-305 (Lippincott Williams & Wilkins)
openalex publication_date 1977/05/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Data are assembled from the Rothamsted classical field experiments on the effects of long-continued cropping and manuring on the amount of organic matter in soil, on the age of this soil organic matter, on the amount of microbial biomass in the soil, and on the rate at which plant residues decompose in these soils. These data were then fitted to a model in which soil organic matter was separated into five compartments: decomposable plant material (DPM, half-life 0.165 years); resistant plant material (RPM, 2.31 years); soil biomass (BIO, 1.69 years); physically stabilized organic matter (POM, 49.5 years) and chemically stabilized organic matter (COM, 1980 years) For unitary input of plant material (1 t fresh plant C ha-1 year-1) under steady-state conditions, after 10,000 years, the model predicts that the soil will contain 0.01 t C in DPM, 0.47 t in RPM, 0.28 t in BIO, 11.3 t in POM, and 12.2 t in COM. The predicted radiocarbon age is 1240 years (equivalent age). The fit between predicted and measured data is sufficiently good to suggest that the model is a useful representation of the turnover of organic matter in cropped soils.