A logistic function was fitted against DAE for root dry weight,
diameter and leaf dry weight:
where Y is the root and leaf dry weight (g plant−1) or root diameter
(cm), wf is the maximum root and leaf dry weight or root diameter,
C is the x values corresponding to the maximum root and leaf dry
weight or root diameter, r is a parameter describing the rate of
increment of growth rate, and x represents the time (DAE).