11 



Although this experiment was run with young trees, there is 



little reason to believe that it would not apply equally well 



to old trees. Of course, large trees nedd more food than do 



small ones, but they are provided with a root system sufficiently 



large ot meet their requirements. Another experiment carried on 



at the Geneva Station (Bull. 289 U.P.Hedrick) between the years of 



1893 and 1904. would seem to bear out this idea. An orchard v/hich 



had^in sod for forty three years was used for this experiment. It 



contained trees of the following varieties; Baldwin, Fall Pippin, 



Rhode Island, Roxbury and northern Spy. In order to test out 



the effects of potash and phosphate on the yield and color of 



fruit, the following amounts of fertilizers were applied to four 



of the eight plats into which the orchard had been divided. 



per tree per acre 



Wood ashes 100# 4800# 



•!:- Acid phosphate 8-^# 408# 



* The phosphate was applied only during the last seven years. 

 According to calculations made the actual amounts of 

 potash and aphosphate applied were as follows: 



Pg Og per acre 72# from ashes 57# from phosphate 

 Kg " " 169# " " 



Lime 1536# |!ier acre 



After ten years of this treatment, the following results 

 were noted. 



Annual average increase in bu per tree. 

 Fall Pippin 1.05 

 Roxbury 2.65 



Greening Minus 0.34 

 Spy 2.55 



