A dead leaf was defined as one that had less than
50% of its area green. Green leaf area index (GLAI) was
estimated as the product of specific leaf area (m2/g) and leaf
dry mass contained in a destructive sample from a 1.5 m row
length (three replicates). Specific leaf area was determined for
each sample by measuring green leaf area (LI-3100 leaf area
meter, LICOR, Lincoln, Nebraska) and leaf dry mass of a subsample