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TEMPO - HOME >>> ENVIRONMENT Press releases >>> PMI104A - Select criteria
PMI104A - Tree defoliation by main species and at all ages by defoliation class: Please select the criteria for your query
Forest species Defoliation classes Years Measure units

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PMI104A - Tree defoliation by main species and at all ages by defoliation class 
Definition Forests health is influenced by air pollution, insects, diseases, fire, bad weather and other meteorological damage.
Data on forests status come from the surveys carried out by National Forest Adminsitration by national network monitoring the forests (4x4 Km) by permanent surveys, as to trees inventoried, resinous and broad-leaved tree species.
One of the indicators presenting the trees deterioration level is the defoliation degree of the trees top.
The defoliation is evaluated by the ratio of fallen leaves according to the established standards and it is divided into 5 classes:
- 0 class: 0-10% = unaffected;
- 1 class: 11-25% = slight;
- 2 class: 26-60% = medium;
- 3 class: 61-99% = severe;
- 4 class: 100% = dry.
 
Periodicity Annual 
Data sources National Company of Forests 
Last update JUL 18, 2007 
Observations Data source is Forest Research and Management Institute, which has data available from 2001.
 
Interruption Last period of this series: Year 2006.
Responsible person Nutescu Olvian, e-mail: olivian.nutescu@insse.ro, int. 2184 
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