16 



CIRCULAR 884, U. S. DEPARTMENT OF AGRICULTURE 



Vegetation in 1940 ox Gopher-Infested Meadow 



In marked contrast with the rather desirable conditions on gopher- 

 free meadow A in 1940 were those of meadow B, where pocket gophers 

 had been allowed to remain from 1931 until 1940 [fig. 9). On the un- 



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Figure 9. — Meadow B after 9 years of gopher infestation: A. On the ungrazed plot the 

 perennial forbs are drastically thinned, and annual weeds, especially cluster tar- 

 weed, greatly thickened: B, on the grazed plot there is a thinner stand of perennial 

 forbs and more annual weeds. (Same quadrats shown in fig. 7.) 



