Fig. 1.

Seasonal dynamics of fine roots were determined by analysis of minirhizotron images collected biweekly during the growing seasons from February 1998 to November 2003. (A) Production during an observation interval was calculated as the length of new roots plus increases in length of existing roots. (B) Mortality is the disappearance of roots during an interval, with corrections made for roots that subsequently reappear. (C) Standing crop is the total length of root visible; changes in standing crop generally reflect production minus mortality. Data are expressed as the length of root per square meter of observation window. Pooled SEs for each year are shown.