FOREST TREES AND FOREST SCENERY 
the excessive or ill-timed grazing of 
sheep, which trample to death the 
young tree seedlings as they pass over 
the ground in great herds and devour 
the last vestiges of vegetation, thus 
leaving a bare and dry forest floor, 
upon which the old trees _ subsist 
with difficulty through the prolonged 
droughts of summer. 
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