222 MASS. EXPERIMENT STATION BULLETIN 180. 



Fertilfzers. 



The season's results with the station bog fertiUzer plots are given in 

 Table 20. The area of each plot, as stated in the report for 1912, is 8 

 square rods, and the variety of berries tested is the Early Black. The 

 plots are on a peat bog with a covering of sand ranging from 6 to 8 inches 

 in thickness. 



Table 20. — Fertilizer Plots in 1916. Yield and Relative Keejnng 

 Quality of Berries. 



1 The storage-test berries from each plot were stored, without being run through a separator 

 or otherwise cleaned, in quart cans on the day they were picked, each can being filled with 

 handfuls of fruit taken from different parts of a separate picking crate, its contents thus rep- 

 resenting as fairly as possible the contents of the crate as it came from the bog. The covers 

 of the cans fitted tightly during the storage, but were not sealed. 



2 Leaf mold worked into a condition in which it could be spread easily with a shovel. 



3 The figures for plot 15 arc probably misleading, as half of that plot was used in spraying tests 

 with Bordeaux mixture in 1913, 1914 and 1915, and certain effects of that treatment may have 

 remained in 1916; though, if the whole plot had yielded at the same rate as did the portion 

 that never had been sprayed, it would have produced only 5.33 bushels. The rot percentage 

 given for this plot is an average of the percentages obtained in the tests of the fruit of the sprayed 

 and the unsprayed parts. 



