Barn and Field Experiments in 1917. 13 



the yields for the fertilized plots dropped 40 per cent below 

 the yields for the plot without fertilizer for the 4 years. Row 

 1 in Plot A, no fertilizer, has an open field on its north. It 

 was thought that possibly this might have borne unusually 

 heavy and explain the no fertilizer plot having the far larger 

 yield. The table that follows shows the yield per tree in each 

 row. The sharp falling off in yield from Row 4 of Plot 6 A 

 to Row 5 Plot 6 B continues through all the other rows in 

 Plots 6 B and 6 C. 



Average Yields in Pounds per Tree by Rozvs in ipiy. 



Plot 6A 



No 



Fertilizer 



Plot 



6B 



7.2 



pounds 



Plot 60 14.4 pounds 











Fsrtiliz 



er 





Pertiliz 



r 



Row 





Yield 



Row 







Yield 



Row 





Yield 



1 





137. S 



5 







93.7 



9 





88.6 



2 





120.1 



6 







74.7 



10 





79.9 



3 





118.3 



7 







68.9 



11 





78.1 



4 





113.9 



S 







69.2 



12 





.65.2 



Avg. 





123.1 



Avg. 







76.5 



Avg. 





77.7 



There is no doubt as to the fact, but the explanation of 

 the fact is not evident. If the marked difference had been in 

 favor instead of against the fertilizer plots or if the season 

 had been deficient in rainfall so that the fertilizer might not 

 have been available to the trees an explanation would suggest 

 itself. There are too many trees in the experiment and the 

 differences are too great, too marked and too uniform to ■ be 

 classed as coming within ordinary experimental error. 



Sod vs. Cultivation. 



The east half of the plots have been in sod only 1 year 

 and it is too soon to look for any marked difference due to the 

 treatment. As full growth notes are kept on' all trees at High- 

 moor Farm the records of the size of the apples and their 

 color for 191 7 in which part of the plots have been in sod 

 are tabulated below. For the sake of comparison the same 

 notes are given for the 2 years before the east half was seeded 

 to grass. 



