PLANTING. 85 



hence number of rows = + 1, and 



a x 'ODD 



number of plants in each row, either alternately = 

 + 1 and ; or always according as to whether 



is a whole number, or \ more. 

 In the one case 



d* x -866 d\ 2d x -866 

 In the other case 



N' = B ^_ ^__ 

 rf U x -866 



N/ . L x B B 

 d* x -866 rf 



/ 



The first term in this and the two previous formulas 

 represents the bulk of the plants. By neglecting the 

 comparatively small number represented by the other 

 terms, the following short approximately correct 

 methods of calculation are obtained for each acre of 

 plantation : 



Square planting 



N 43560 __ 



Square of planting distance. 



Triangle planting 



4356 



Square of side of triangle 

 Line planting 



43560 



x 1-155. 



Distance between lines x distance in lines. 



