PLANTING 29 



For setting out an interplanted orchard, say ap- 

 ples filled with peaches, trees i6j^ feet apart, there 

 will be required 40 apples and 120 peach trees to 

 each acre. If the trees are to be set 20 x 20 feet the 

 number of apple trees will be 27, and the number 

 of peach trees as fillers will be 81. 



In order to find the number of trees required to 

 plant an acre at any other distances, multiply the 

 distance between trees in one direction by the dis- 

 tance in the other direction and divide 43,560 by the 

 product. For example, if it be desired to set a plan- 

 tation with trees 12 x 32 feet, the required number 

 would be computed thus : 



43,560 -r- (12x32) =113 trees to each acre 



DOUBLE PLANTING AND INTERPLANTING 



When a new orchard is set out, say, with apple 

 trees 40 feet apart, the ground is only partially 

 occupied. In fact, the trees do not use more than 

 one-fourth of the ground during the first 10 years 

 of their growth; for another 10 or 15 years, they 

 will be using one-half the land, more or less. On 

 the other hand, if the trees are planted 16 or 20 

 feet apart, so as to economize space and use the 

 soil to greater advantage during the early years of 

 growth, they presently crowd one another and are 

 greatly damaged by such close planting. These 

 are very serious situations and practical orchardists 

 have made considerable effort to meet the difficulty 

 in various ways, usually by double planting or in- 

 terplanting. 



Double planting consists in putting out the trees 

 at one-half the required permanent distance; thus, 

 if it is desired to have the trees stand finally 40 feet 



