PREVENTION OP EROSION BY TERRACING. 



11 



which collects above the terraces, and the sodded surface prevents 

 erosion of the terrace due to impounded water overtopping it. 



This type of terrace is cheap to construct, easy to maintain, and 

 affords a very convenient guide row in plowing and planting. The 

 80 



Fig. 



10 15 20 25 



Average S/ope of lancf in Feet per Huncfrecf 



30 



4. — Horizontal-bench terraces. Curves showing width of bench for different land 

 slopes and vertical distances between terraces. 



principal objections to its use are (1) the land occupied by the sodded' 

 terrace reduces the total amount of tillable land in the field; (2) 

 the growth on the terrace saps the strength from the adjoining soil, 

 resulting in a dwarfed plant growth on either side of the terrace; 



