46 



CIRCULAR 870, U. S. DEPARTMENT OF AGRICULTURE 



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Figure 18. — Light utilization. This degree of grazing on California annual-plant 

 range maintains a good soil condition, early forage growth during the winter, and 

 full yields of a good plant mixture in the spring. Under very light grazing on some 

 ranges, however, wild oat or ripgut brome may increase to an undesirable amount. 

 While favorable for plant growth, light grazing leaves herbage that could be used 

 emcientlv bv cattle. 





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Figure 19. — Pattern of swale utilization in lightly grazed range. The clovers and 

 rushes in the rather narrow swale bottom (wet swale) have been cropped to less 

 than 1-inch stubble height; the heavy growth of grass (principally Mediterranean 

 barley) at the margin of the swale (dry swale) shows patchy use. 



