Establishing the Apple Orchard 149 



tervals in this line, it will be possible to establish the 

 position of the trees in this first row. By establishing 

 another line at right angles to the first, it will be possible 

 with the use of stakes to sight across and establish par- 

 allel lines which will serve as guides in lining up the rows. 

 It is usually advisable to set a stake at the place for eacli 

 tree. Then after sighting across from the base lines, 

 it will be possible to determine the stakes which are not in 

 alignment. Figure 2 shows the three important systems 

 for laying out commercial plantings. Table VIII indi- 

 cates the number of trees to the acre under different plant- 

 ing distances and systems. 



TABLE VIII. NUMBER OF TREES TO THE ACRE 



Distance Apart Square Hexagonal Quincunx 



16x16 170 196 303 



18x18 134 154 239 



20x20 108 124 129 



22x22 90 104 148 



24x24 76 87 132 



25x25 70 80 125 



26x26 64 74 114 



28x28 56 64 I 100 



30x30 48 55 85 



32x32 43 49 76 



33x33 40 46 71 



35x35 35 41 65 



36x36 34 39 60 



40x40 27 32 48 



45x45 22 25 39 



Hexagonal system. 



The use of a wire triangle is recommended for planting 

 trees under the hexagonal system. Each side of the tri- 

 angle should represent the distance between the permanent 

 trees. The wires should be connected at each angle by 

 means of rings. The triangle is then carried about by 



