Sampling tree tops by helicopter...special pole pruner cuts branchlets

John F. Wear; Robert G. Winterfeld

Treesearch

Sampling tree tops by helicopter...special pole pruner cuts branchlets

Informally Refereed

Authors:

John F. Wear, Robert G. Winterfeld

Year:

1966

Type:

Research Note

Station:

Pacific Southwest Research Station

Source:

Res. Note PSW-RN-131. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p

Download (PDF 1.39 MB)

Download (PDF 1.39 MB): https://research.fs.usda.gov/download/treesearch/37896.pdf

Abstract

A new technique for sampling tops of tall Douglas-fir trees by using a special pole pruner from a helicopter has been developed and field-tested. Thee pole pruner cuts and holds a branchlet. Foliage samples collected will be compared by spectral analysis to show the type of aerial imagery that best differentiates healthy trees from those attacked by root rot.

Citation

Wear, John F.; Winterfeld, Robert G. 1966. Sampling tree tops by helicopter...special pole pruner cuts branchlets. Res. Note PSW-RN-131. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p