Bui. 367, U. S. Dept. of Agriculture. 



Plate IX. 



Fig. 1.— Conditions in an Arroyo, Showing how the Grass Retards Erosion 

 AND Helps to Fill in Washed Places on the Santa Rita Range Reserve. 



Hundreds of places may be found on the reserve where different stages of this process of 

 leveling up are in progress. 



Fig. 2.— The Boundary Fence between the McCleary (Left) and MacBeath 

 (Right) Pastures in May, 1914, Showing the Extent to Which the Forage 

 ON These Pastures is Fed off Each Season. 



