34 CIRCULAR 925, U. S. DEPARTMENT OF AGRICULTURE 
forage within this subtype. ‘This improvement is in marked contrast 
to the results obtained on the winterfat and shadscale subtypes where 
Indian ricegrass formed a much smaller proportion of the plant cover. 
In 1942 when further comparisons were made, Indian ricegrass was 
still the highest producer of forage on the moderately grazed shadscale- 
Indian ricegrass subtype. ‘The number of plants per unit of area was 
about 50 percent greater than on the heavily grazed range. Fifty 
plants were harvested at random from both the moderately and heavily 
grazed portions of the subtype and compared (fig. 15). Those from the 
moderately grazed range averaged 131% inches in height and prcduced 
17.7 grams of air-dry herbage per plant as against 1014 inches and 6.7 
grams for those from the heavily grazed range. Seed production was 
3.2 times larger under moderate grazing than under heavy. 
F—425597 
Figure 15.—Fifty Indian Cees plants harvested at random from heavily grazed 
range (top and third rows), and fifty from moderately grazed range (second and 
bottom rows) in the shadscale-Indian ricegrass subtype. 
The more abundant and better-filled seeds produced by vigorous 
plants obviously favor the establishment of a greater number of seed- 
lings. In the case of Indian ricegrass, however, years of good seed 
