Smithsonian Report, 1949.—Egbert H. Walker PLATE 8 
1. EROSION AND ITS CAUSE NEAR WAIHO DOWNS, SOUTH OF TIMARU, CANTERBURY 
PROVINCE, SOUTH ISLAND 
When sheep overgraze the grass and cut the turf, erosion occurs. Fencing out the sheep (left) allows the 
vegetation to help control erosion. (Photograph by E. G. Holt, U.S. Soil Conservation Service.) 
2. AN OVERGRAZED HILL IN TUSSOCK-GRASS COUNTRY, LINDA PASS, OTAGO 
PROVINCE, SOUTH ISLAND 
Soil, bared by overgrazing between the tussocks, is covered with pale green scabweed (Raoulia lutescens) 
which in turn nurses tussock-grass seedlings. (Photograph by E. H. Walker.) 
