28 FARM AND SCHOOL PROBLEMS. 



On the average farm there is very little regard for definite 

 plans and systems for future use in drainage ; consequently the 

 practice is now generally followed of putting in "strings" of tile 

 in low wet places without regard to future requirements or im- 

 provements. 



There should be a drainage plan for the farm. 



There should be a map showing location, depth, and size 

 of tile. 



A map will be of great importance when drains need to be 

 cleaned, repaired or when new drains are to be installed. 



EXERCISES. 



1. Draw plans for a complete drainage system for the home farm 

 or some convenient tract of land adjacent to the school grounds. 

 "1. Draw plans for draining the school grounds. 



PROBLEMS FOR SOLUTION. 



1. If the capacity of tile to carry water varies as to the square of 

 the diameter, how many times as much water will 6-inch tile carry as 

 4-inch tile? 



2. If in doubling the grade or fall for 100 feet of a tile drain, its 

 capacity for carrying water is increased about one-third, how much will 

 the carrying capacity be decreased if the grade is lowered by one-half? 



The Cost of Tile. 



3. A study of 21 Ohio farms slightly above the average in farm 

 management, showed an average investment of $366.43 per farm for 

 drainage; if the average size of the farms was 165 acres, what was the 

 amount expended per acre for tiling? 



4. At an expense of $20 per acre, how many acres could be thor- 

 oughly tiled for $366.43? 



The price of tile usually varies with the locality. An in- 

 vestigation of the cost in various parts of Ohio, as reported by 

 reliable authorities show that on an average : 



Two and one-half inch tile cost 14 to 16c per rod. 

 Three inch tile cost 16 to 20c per rod. 

 Four inch tile cost 19 to 25c per rod. 

 Five inch tile cost 30 to 36c per rod. 

 Six inch tile cost 40 to 50c per rod. 



