Bui. 1031. U. S. Dept. of Agriculture. 



Plate I. 



F-36S42-A 



Fig. I. — Black Grama-Grass Range in Southern New Mexico. 



In good years there is abundant feed on this kind of range, but in time of drought thecarrj-ing 

 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-43r95-A 



Fig. 2. — Tobosa-Grass Range on the Jornada Range Reserve. 



The gro\vth habits, compact soil it occupies, and low forage value after the growing season adapt 

 this type of range to summer grazing. It is not easily killed out but carrying capacity is 

 very low in time of drought. 



