62 N. J. Agricultural Experiment Station, Bulletin 348 



deeper cut to insure the free flow of the water. As the upland 

 is approached, the sod and underlying muck become less than 30 

 inches deep and a sand or clay bottom appears. The ditches are 

 allowed to become shallow as the sod gets thinner. Neither sand nor 

 clay subsoil is cut into except as the drainage of a pool or area 

 behind the barrier requires such action. 



^,**^ 



'v /^ 



'':^J•; 



' ■■'/J0M^ tfv^i^- A^^A?*? ^■''- ■ 



Fig. 32. Spur ditching; siioit ditches are run irom the main to large salt holes. 



In so far as the nature of the marshes will permit, these 10 by 30- 

 inch ditches are opened into the natural creeks that meander through 

 them. When such drainage is impossible, large main ditches, 30 

 inches deep by as great width as may be necessary, are cut as out- 

 lets. 



In cutting the ditches it is best to remove the sod in pieces 10 

 inches wide, 30 inches long by 6 to 8 or more inches thick, because 



