N low 



N high 



P low 



P high 



K low 



K high 



Complete 

 low 



Complete 

 high 



Co low 



Co high 



Mg low 



Mg high 



S low 



S high 



Control 



Leader Growth, inches 



ro -P> <Ti 



bob 



1 — 



T 



01 



01 



01 

 01 



01 



01 

 01 



01 



01 

 01 



0) 



->l 



01 

 01 



01 



01 

 01 



01 



01 

 01 



01 



->1 



01 



01 

 -n1 



00 



b 



o 

 b 



Figure 2. Leader growth acceleration, 1966 and 1967 as compared to no fertilizer year 

 1965, Growers' Plots, for all treatment and control. 



14 



