12 



Maine Agricultural Experiment Station. 1918. 



beyond that the soil is not asked to pay tribute to any crop 

 removed from the plots 



In the following tables the western half of each plot is 

 designated as cultivated plot and the eastern half as plot in 

 grass. The plot in grass was really not in sod until 1917 pre- 

 vious to which, it was under cultivation the same as the other 

 plots. The yields for the 4 years are given in the table that 

 follows. In the upper portion of the table the parts cultivated 

 and in sod are reported separately and in the lower portion the 

 results are combined to show the average yields from the dif- 

 ferent fertilizer treatments. 



Table Giving the Yields of Apples in Pounds Per Tree for 

 Each Plot and Each Treatment for 4 Years. 



Tear 



PLOT 6 A 



No fertilizer since 

 1912 



PLOT 6 B 



7.2 pounds 5-8-7 

 fertilizer per tree 



PLOT 6 C 



14.4 pounds 5-8-7 

 fertilizer per tree 



1914 

 1915 

 1916 

 1917 

 Average 



Cultivated 

 165.4 

 118.6 

 105.9 

 117.7 

 126.9 



In grass 

 198.0* 

 131.5* 

 127.3* 

 127.6 

 146.1 



Cultivated In grass Cultivated In grass 



145.9 

 134.9 

 141.2 

 72.2 

 123.6 



179.6* 

 149.0* 

 137.6* 

 80.2 

 136.6 



186.6 

 145.6 

 155.9 

 79.6 

 141.9 



203.1* 

 162.0* 

 129.8* 

 75.6 

 142.6 





Both Parts 



Both Parts 



Both Parts 



1914 



183.2 



164.2 



194.5 



1915 



125.6 



142.6 



153.5 



1916 



117.6 



139.2 



142.4 



1917 



123.1 



76.5 



77.7 



Average 



137.4 



130.6 



142.0 



*These were cultivated in years 1914, 1915, and 1916. Seeded to grass in August 1916. 



As the parts in grass had been seeded only a single season 

 the slight differences in yields between the cultivated parts of 

 the plots and the parts in grass for the year 191 7 are not 

 discussed. 



The interest therefore lies in the last half of the table "in 

 which the average yields from the trees in the differently 

 fertilized plots are shown. The yields for 191 3, the first year 

 after the different fertilizer treatment began, are omitted. In 

 the second year (1914) no differences that can be attributed to 

 the fertilizing appear. In 1915 and 1916 there is a small but 

 constant difference in favor of the fertilized plots. The yield 

 increases with the amount of fertilizer applied. But in 1917 



