Figure 6

Stand structure of trees ≥ 10 cm girth in ‘Khasi hill sal’ forest in Meghalaya: a) structure in horizontal space, in nine girth classes, follows an exponential decline with increasingly slower rate as the size of girth increases, and b) vertical stratification in six height classes follows a unimodal exponential decline at relatively steady rate. The girth classes (cm) are: 1, ≥ 10 to < 30; 2, ≥ 30 to < 60; 3, ≥ 60 to < 90; 4, ≥ 90 to < 120; 5, ≥ 120 to < 150; 6, ≥ 150 to < 180; 7, ≥ 180 to < 210; 8, ≥ 210 to < 240; 9, ≥ 240. The height classes (m) are: 1, ≥ 0 to < 5; 2, ≥ 5 to < 10; 3, ≥ 10 to < 15; 4, ≥ 15 to < 20; 5, ≥ 20 to < 25; 6, ≥ 25.