Forest health surveys--a critique.

  title={Forest health surveys--a critique.},
  author={John L. Innes},
  journal={Environmental pollution},
  volume={54 1},
Surveys of forest health, as presently undertaken, provide information on the general condition of forests. They integrate the effects of all factors, biotic and abiotic, of which pollution is but one, that affect trees. Most surveys are based on the assessment of crown density and crown discoloration. These assessments are subjective and serious errors can occur. In some cases, the sampling design that has been adopted is not the most suitable for the forest area under investigation. The… CONTINUE READING