Manual on methods and criteria for harmonized sampling, assessment, monitoring and analysis of the effects of air pollution on forests - Part IV: Visual assessment of crown condition and damaging agents

The ICP Forests Task Force (International Co-Operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests) is a working group under the UNECE/CLRTAP. Its monitoring manual documents the harmonized methods for sampling and analysis as adopted by the participating countries of ICP Forests.