Bul. 1031, U. S. Dept. of Agriculture. PLATE iz 
F-36842-A 
Fic. I.—BLACK GRAMA=GRASS RANGE IN SOUTHERN NEW Mexico. 
In good years there is abundant feed on this kind of range, but in time ofdrought the carrying 
capacity may be reduced as much as 50 per cent or more. Reduction of grazing 30 to 50 per 
cent of the year-long rate during the growing season is the main requirement for maintenance 
of grama-grass range. 
F-43195-A 
FIG. 2.—TOBOSA-GRASS RANGE ON THE JORNADA RANGE RESERVE. 
The growth habits, compact soil it occupies, and low forage value after the growing season adapt 
this type ofrange to summer grazing. Itis not easily killed out but carrying capacity is 
very low in time of drought. 
