Table 4: Relationship between profitability of timber sales of varying sizes by source of timber supply (public forests).

Timber sales 1–20 acresTimber sale  21–80 acresTimber sales  81+ acres
profitability  ratioa profitability  ratioa profitability ratioa

Firms with 0–24% of timber supply from public forests1660.852570.881490.86
Firms with 25–49% of timber supply from public forests330.70530.83370.81
Firms with 50–74% of timber supply from public forests220.68520.75270.74
Firms with 75–100% of timber supply from public forests170.58340.75340.88
F = 4.757
df = 3 df = 3 df = 3
P =  .003

aRatio consisting of the number of total sales in the acreage category divided by the number of profitable sales in the acreage category (range is from 0 to 1).