New tree marking system improves forest spraying operations
Contributors: Howard, Benton; United States. Forest Service. Pacific Northwest Region. Insect and Disease Control Branch
Publisher: Insect and Disease Control Branch, Division of Timber Management, Pacific Northwest Region, U.S. Dept. of Agriculture, Forest Service
Published: 1966
Place of publication: [Portland, Or.]
Language: eng
Subjects: Aerial spraying and dusting in forestry; Helicopters in forestry
Notes: Issued Mar. 1966.