DEAINING NOTES 



217 



DEPTH OF DRAINS. 



Stiff clay 2 feet 6 inches deep. 15 feet apart 



Friable clay 2 „ „ „ 18 „ 



Soft clay 2 „ 9 „ „ 21 „ 



Loam, with clay 3 „ „ „ 21 „ 



„ „ gravel 3 „ „ „ 27 „ 



Light loam 3 „ 3 „ „ 33 „ 



Sandy „ 3 „ 6 „ „ 40 „ 



Light sand 3 ,, 9 „ „ 45 „ 



Gravelly sand 4 „ ,, „ 50 „ 



NUMBER OF 12.INCH PIPES REQUIRED PER ACRE AT 

 DIFFERENT DISTANCES BETWEEN DRAINS. 



12 feet apart 



15 „ 



18 „ 



21 „ 



27 „ 



33 „ 



40 „ 



60 „ 



60 „ 



= 3630 pipes. 



= 2904 



= 2420 



= 2073 



- 1613 



= 1320 



= 1089 



= 871 



= 726 



PLANTATION TABLES AND NOTES. 



PLANTING IN SQUARES. 



To find number of trees required to plant an acre: 



Divide the square feet in an acre (43,560) by the square 



of the distance apart of the plants in feet for instance 



^"=1,210 trees, 

 o xo 



Quincunx= double the number. 



