Measure of inter-tree crowding of the tree crowns in a stand. Reference: Field Survey (MID 266: Schlussgrad)

Code	Text	NFI1	NFI2	NFI3	NFI4	NFI4b	NFI5
-1	n/a	x	x	x	x	x	x
1	crowded	x	x	x	x	x	x
2	normal		x	x	x	x	x
3	loose		x	x	x	x	x
4	open		x	x	x	x	x
5	scattered		x	x	x	x	x
6	grouped crowded		x	x	x	x	x
7	grouped normal		x	x	x	x	x
8	heterogeneous	x	x	x	x	x	x
9	normal, loose	x
10	open, scattered	x
11	crowded, clustered normal	x