Bui. 745, U. S. Dept. of Agriculture. 



PLATE II 



FIG. I. EQUIPMENT USED FOR CHOPPING SOAPWEED INTO CATTLE FEED. 



Threo men are required to operate this machine. The chopper cost from $300 to $550 and requires 

 a 15 to 20 horsepower engine to operate it. Run at fuD capacity it will chop from 25 to 30 tons 

 of soapweed per day. 



FIG. 2. EFFECT OF WIND EROSION ON SOIL FOLLOWING THE REMOVAL OF 

 SOAPWEED AND OTHER VEGETATION BY EXTENSIVE GRAZING AND TRAM- 

 PLING NEAR AN IMPORTANT WATERING PLACE. 



The top of the root stumps was the former ground surface. 



