Scoring system for crown distance. (International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests (ICP Forests, 2010)
Link to this table.
|2||Closed||Crowns touch one another|
|3||Loose spread||Gap between crowns up to one-third of average crown diameter|
|4||Spread||Gap between crowns up to two-thirds of average crown diameter|
|5||Distant||Gap between crowns from two-thirds up to one whole of average crown diameter|
|6||Very distant||Gap between crowns > 1/1 of average crown diameter|
It is recommended to start with the tree standing closest to the sample tree in a clockwise procedure, score values are to averaged. Dead trees are taken into account as long as they are in the crown condition sample. Calculation: (Score 1 + Score 2 + Score 3 + Score 4)/4=CDRD_N</fontsize>