root length and growth

root length and growth.csv - 'plotnr' shows plot number - 'manip' 1=control, 2=short-term manipulation, 3=long-term manipulation - 'length' is root length at sampling occasion (average out of 3 minirhizotron tubes per plot) - 'growth' is root growth from that sampling occasion to the next (average out of 3 minirhizotron tubes per plot; NA for last sampling, as the growth is always the change between two dates) - 'sampling' sampling occasion - 'doy' day of year of sampling occasion