RAINFOR GEM Intensive Plots Manual (pdf) - University of Oxford

AnalysisIn-growth core calculations follow the method of Metcalfe et al. (2008b). To estimate root mass that wouldhave been collected if processing had continued beyond 40 min, use the following procedure. First, fit a curve(usually a power curve) through root mass removed over time for each core (i.e. through the cumulative rootmass recorded in the 10 min intervals). Use the equation for the curve to estimate root mass collected over timeafter 40 min. Estimated mass collected will seldom reach absolute zero, in this case the cut-off point is wheremass collected in a single time step < 1% of the cumulative total root mass already collected. Don’t forget tocalculate the volume of the in-growth core correctly (see Box 3).34