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Table 1 Thinning treatments, prescribed and actual, for the Douglas-fir trees growing on the two sites

From: Linking acoustic velocity of standing Douglas-fir trees to veneer stiffness: a tree-log-product study across thinning treatments

 

Thinning Prescription

Actual Treatment

 

Plot

Relative density thinning triggers1

Site 803

Site 808

A

Control

Control

Control

B

RD55-RD30

RD55-RD30 attained; one thinning.

RD55-RD30 attained; one thinning.

C

RD65-RD35

RD65 not attained; no thinning.

RD65 attained; one thinning.2

D

RD55-RD30 then RD50-RD30

RD55 attained; one thinning. RD50 not attained; no further thinning.

RD55 attained; one thinning. RD50 not attained; no further thinning.

E

RD55-RD35 then RD55-RD40 then RD60-RD40

First RD55 attained; one thinning. Second RD55 not attained; no further thinning.

First RD55 attained; one thinning. Second RD55 not attained; no further thinning.

  1. 1 Thinning triggers are defined by stand relative density (RD), thus when the stand reaches a RD of x, thin to leave the stand with a RD of y (RDx-RDy).
  2. 2 Plot later lost due to storm.