Winifred E. Bhenchley 



161 



N umber of 

 plants 



"• ^ 2 . ^ ^ '' o ^in^1 ^13, ^5 17 19 21 23 25 27 29 31 

 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 



Nmnber of stalks or tillers. 



Fig. 7. Curves showing the number of barley plants with various numbers of tillers when 

 grown under conditions of (1) crowding, (2) adequate spacing. 64 plants in each set. 

 Black line — spaced plants. Dotted line— crowded plants. 



Fig. 8. Diagram showing the number of tillers produced by each of 64 crowded 

 barley plants in the positions they occupied during growth. 



