238 



CITRUS FRUITS AND THEIR CULTURE. 



<$ 



Fig. 57. 



Hexagonal system of 

 planting. 



triangles. 



It is the only system 

 whereby each tree is 

 placed equally distant 

 from each of its adjoin- 

 ing neighbors and the 

 only system which equal- 

 ly divides the space 

 among the trees. By this 

 method about 15 per cent 

 more trees can be set per 

 acre than by the rectang- 

 ular. 



For permanent plant- 

 ings, at regular distances 

 this system and the rect- 

 angular should be rec- 

 ommended before the others. 



Hexagonal, Septuple or 

 Equilateral Triangle System. 

 By this system six trees are 

 set equidistant from a seventh 

 placed in the center. The ba- 

 sis of the system is not the 

 square but the circle, since the 

 radius of the circle is approx- 

 imately equal to one-sixth of 

 the circumference of the circle. 

 The name septuple, sometimes 

 applied to this system, refers 

 to the fact that the number of 

 trees in each group-unit is 

 seven. Equilateral triangle 

 system refers to the planting 

 of the trees in equilateral 



X ; X : X. ': X 



'/. : X i X ! )* 



V''' i V i 'X'' ; '> 



Fig. 58. Quincunx system of planting. 



