For giant reed the sampled
area was of 0.5 m
×
1.0 m = 0.5 m2, with three replications per
sampling date. For sweet sorghum 1 m trait of row was sampled,
i.e. 1
×
0.45 m = 0.45 m2, with two replications for each individual
sampling date. The LAI was measured with a Delta-T leaf area metre
WinDIAS image analysis system.