102 MASS. EXPERIMENT STATION BULLETIN 160. 



Table 4. — Effect of Fertilizers on Quantity and Keeping Quality of 



Cranberries. 



Plot. 



Fertilizer 

 used. 



Date 

 picked. 



Quantity 

 of Fruit 

 produced 

 (Bushels). 



Quantity 



of Fruit 



in Storage 



Test 

 (Bushels). 



Loss 



in Storage 



(Per 



Cent.). 



O 

 N 

 P 

 K 

 O 



NP 



NK 



PK 



O 



NPK 



NPKL 



NPKcl 



O 



N.,PK 



NKP.X 



NKP, 



NPKij^ 



NPKo 



O 



O 



O 



Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 16 

 Sept. 17 

 Sept. 17 

 Sept. 17 

 Sept. 17 

 Sept. 17 

 Sept. 16 



9 



8 



m 



10 



105/12 



9 



9M 

 10 

 9 

 6% 



lOK 

 10^ 



27.45 

 31.37 

 20.59 

 24.51 

 26.96 

 34.00 

 31.37 

 23.53 

 29.41 

 33.00 

 37.25 

 28.43 

 22.53 

 24.51 

 26.96 

 27.45 

 23.04 

 30.39 

 25.49 

 31.37 

 32.50 



22.22 



As some of the 1913 experiments had seemed to indicate that the 

 setting of the blossoms was stimulated and increased to a considerable 

 extent by the application of nitrogenous fertilizers during the beginning 

 of the bloom, special tests to detemiine this point were conducted this 

 year. Two plots of four square rods each — one "Early Black" and 

 one "Late Howe" — were fertihzed on July 3, the former variety being 

 in full bloom and the latter needing about a week longer to reach that 

 condition. The fertihzer was apphed at the following rate per acre: 

 150 pounds of nitrate of soda + 400 pounds of acid phosphate + 200 

 pounds of high-grade sulfate of potash. The sand with which the fer- 

 tihzer was mixed to insure even appUcation stuck to the vines consid- 

 erably, and it was feared that it might injure the bloom more or less, es- 

 pecially that of the more advanced early variety. The fertilizer was 

 soaked into the bog by a storm which began at 6 p.m. on July 6, there 

 having been no previous rainfall whatever since its appUcation. The 

 plots were examined on July 7, and the "Early Black" vines were then 

 found to be somewhat past full bloom, those of the "Howe" variety hav- 

 ing not yet quite reached that condition. Table 5 shows the results 

 obtained with these plots. The size of the berries is indicated by the 

 niunber it took in each case to fill the inspector's cup of the New England 

 Cranberry Sales Company, two samples being averaged for the "Early 

 Black" records and six for the "Late Howe." The smaller the berries the 

 greater, of course, was the number it took to fill the cup, the sizes, there- 

 fore, being inversely proportional to the numbers given in the table : — 



