THE MANGUM TERRACE. 7 



OTHER METHODS OF CONSTRUCTING THE TERRACE. 



Figure 4 shows a terrace bank thrown up with a road scraper. 

 This should be gone over with the plow and smoothed down so that 

 the upper side of the terrace will present a broad, flat surface in- 

 stead of a sharp depression in the ground, bearing in mind that the 

 purpose of the ]Mangum terrace is to conduct the water off in a wide 

 stream so as to prevent erosion. 



Fig. 4. — Ternice bank thrown up with a road scraper. The sharp depression on the 

 upper side will be eliminated when the area is plowed over, and the water will then 

 spread over a broadpr surface. 



Figure 5 shows the first steps in constructing a terrace with a road 

 scraper by simpl}' scraping the dirt dow^n hill. This is to be gone 

 over next with a plow, making the lower side of the present bank 

 the center of backfurrowing. 



Figures G and 7 show fields in which the rows run directly over 

 the terrace. 



Figure 8 shows a cultivator crossing the terrace. 



Figure 9 shows the adaptability of the Mangum terrace to perma- 

 nent pasture lands. 



[Cir. 94] 



