of the grass in the open grassland was harvested for analysis on 19
August 2005 (84 days after the beginning of the experiment), 12
October 2005 (139 days), 15 December 2005 (203 days), and 29
March 2006 (307 days). Grass samples were taken at 1 m intervals
from 0 m (tree row) up to 5 m from the 15 m-outside tree row of
the agroforestry plot. For each distance, samples were taken from
two adjacent 0.2 m 0.5 m quadrats, by using an electric hand
mower to cut the grass at 1 cm height. The samples of each
quadrat were analyzed separately to have two replicates per site.
Grass was harvested at the same sites throughout the experiment.
After each sampling, the remaining grass in the plots was cut at
1cmheight.