PRELIMINARY OPERATIONS 167 



Metric Measurement 



Number of Sowing or Planting Spots in a Hectare on the 



l> ting 

 mce 

 he 

 s in 



res. 



) 

 15 



15 

 > 



Square 

 Pattern : 



40,100 

 18,040 

 10,200 

 6,560 

 4,580 

 3,380 

 2,600 

 1,680 

 1,180 



1-5 



1-75 



13,600 

 9,090 

 6,830 

 5,480 



11,690 

 7,810 

 5,870 

 4,710 

 3.930 



6,900 

 4,610 

 3,470 

 2,780 

 2,320 

 2,000 

 1,750 

 1,410 



British Measurement 



Number of Sowing or Planting Spots in an Acre on the 



Square 

 Pattern 



11,100 



7,140 



4,980 



3,680 



2,830 



1,830 



1,280 



950 



730 



580 



480 



340 



220 



Equi- 

 lateral 

 Triangle 

 Pattern : 



12,800 



8,180 



5,700 



4,210 



3,230 



2,090 



1,460 



1,080 



840 



670 



540 



380 



250 



Rectangular Pattern : the Distance, in Feet, from Line to Line, being 



14 

 9 

 7 

 5 



940 

 960 

 470 

 980 



350 



8J 



12,870 

 8,580 

 6,430 

 5,150 

 4,290 



11,310 

 7,540 

 5,660 

 4,520 

 3,770 

 3,230 



1,160 1,010 

 950 830 



9,140 

 6,090 

 4,570 

 3,650 

 3,040 

 2,610 

 2,290 



810 

 670 



10 



1,910 



1,590 



1,370 



1,190 



960 



800 



680 



600 



530 



410 

 330 



The above tables have been calculated for one 

 hectare or one acre only.. When large areas have to 

 be afforested the following rough methods of calculation 

 can be employed as approximately correct : x 



1 Schlich, op. cit. vol. ii. p. 182. 



