We analyzed 14C based turnover rates of the chemically bounded fractions of humic acid and humin in ultisol on the tower and reference site. These were compared to the physically separated fraction based on the density and the particle size of macro and micro aggregates.
Cherkinsky, A., and R. Ehlinger (2016): 14C comparative analyses of different SOM fraction in Ultisol, Calhoun CZO. Calhoun CZO 2016 Summer Science Meeting, Clinton, SC.
This Paper/Book acknowledges NSF CZO grant support.