Koford 326 Cynomys ludovicianus December 22, 1955 Nr. Fb. Collins, Gla. but some acrotal pigment; no sperm in cauda epid.; testes abdominal. Large fat 07. || Talked with G.E. Kleppel of A.R.S. He loaned me data on vegetation of pasture & sycloerus in sec. 22. He said that in sycloerus forage improves for a few years, then may go back. Bgrs may grow, then die back in late summer. Bgrs greens earlier than Bda 20 days early. Not increase with even mod. or light use, de- creases & Bda increases heavy use. Bda increased on range between 1946-48 and 1952-53. In heavy use pasture held own, in mod. use, lost about 25%, with light use lost about 33%. Bgrs had 25% loss with no use & moderate use, 35% loss with heavy use. || Stipa & Carex may grow up very early if they grew previous fall. Any greens up early, purplish shoots, as early as March 15, sometimes a month later. Cut low buy dogs, so harms growth (also eats only in season before Bgrs. One yr. Bgrs not grow much until Sept. Rain distribution generally more important than grazing in vegetational effect, if grazing was not heavy. Asm seed more important than in Bda- Bgrs. Bda usually starts first in hard ground. Bgrs starts fast when cactus comes, Asm may be alive but not show above ground, & able to grow. Mully Toneyi stays about same regardless of grazing; not utilized by cattle; short-lived. || Sect. 22 has moderate use, about 42 head/section average in CPER; but about 50 head/AK in SW quarter, but use out-