Forest research notes, Pacific Northwest Forest Experiment Station, No. 04, June 27, 1930.

Abstract

Some definite figures on the survival and seed production of seed trees left on national forest timber sales in the Douglas fir region are now available for six representative areas where approximately two trees were left per acre. The studies mere made by men in charge of timber sales on the national forests under the direction of the Experiment Station, and have now been under way from two to five years.

Citation

null 1930. Forest research notes, Pacific Northwest Forest Experiment Station, No. 04, June 27, 1930. PNW Old Series Research Notes No. 4, p. 1-8