Long Description of Figure 1:

Growth of Douglas-fir seedlings in four eastern Washington soils after removal of successive surface soil layers (% of maximum expected growth - percentages are approximate) -- Treatment 1 (No surface soil removed): Location 1 - 100%, Location 2 - 100%, Location 3 - 100%, Location 4 - 100%; Treatment 2 (5 cm of surface soil removed): Location 1 - 20%, Location 2 - 40%, Location 3 - 70%, Location 4 - 75%; Treatment 3 (10 cm of surface soil removed): Location 1 - 17%, Location 2 - 50%, Location 3 - 60%, Location 4 - 85%; Treatment 4 (15 cm of surface soil removed): Location 1 - 15%, Location 2 - 28%, Location 3 - 60%, Location 4 - 80%