6 



THE MANGUM TERRACE. 



When the line is hiid out, the terrace can be constructed in any 

 one of several ways. In many cases the most convenient -way is 

 shown in figure 3. This figure shove's the first steps taken toward 

 constructing the terrace after a line has been laid out. With a 

 2-horse plow, a backfurrow strip about 15 feet wide, centering on 

 this line of broom straws, has been thrown up. When the ground has 

 settled after a rain the backfurrowing process is repeated. If there 

 is not sufficient time to wait for a rain, the upper side of the ridge 

 can be thrown across on the lower side with shovels. In this way 



Fig. 3. — The first steps in constructing a Mangum terrace. A buclifurrowiug area centers 



along the grade line. 



the terrace is constructed. It should be carefully watched the first 

 year, for it takes several j^ears to build up a thoroughly strong and 

 reliable terrace bank. The next year the terrace is backfurrowed 

 again, and this is continued from year to year until the desired height 

 is reached. The proper height will depend upon the slope of the 

 land, the steeper slopes requiring higher banks. 



These terrace lines are usually laid off at intervals of about 6 feet 

 of fall in the slopes of the land. This would make them come on 

 very steep land sometimes 20 to 30 steps apart and on very slightly 

 sloping land 50 to 75 steps apart. 



[Cir. 04] 



