24 MAINE AGRICULTURAL KXPERIMLNT STATION. I906. 



Arrangement of acre plots, pounds of fertilizer and constituents 

 applied and yield of potatoes. 



1 

 2 



3 

 4 

 5 



6 



7 



8 



9 



10 



11 



12 



13 



Fertilizer Used. 



Kind. 



a 

 s 

 o 



S 

 < 



Pounds per acre in 

 Fertilizer Used. 



c 

 c 



J?; 



Phosp)iorlc 

 Acid. 



.0 



S3 



Oi 



> 

 < 



o 



o 



Yield of 

 Potatoes. 



.0 



s 

 si 





M 



Watson's Improved. 



Home Dfiixed 2 



Watson's Improved. 



Home mixed 3 



Watson's Improved. 

 Home mixed 3 A . ... 

 Watson's Improved. 



Home mixed 2 



Watson's Improved. 



Home mixed 3 



Watson's Improved. 



Home mixed 3 A 



Watson's Improved. 



Bbls. 

 5 

 6 

 11 



7 

 5i 



3 



5 



4i 



4 



4 



4i 



5 



The irregularities of the yields on the first 4 plots can be 

 explained by the differences in the character of the soil. Com- 

 paring the yields on the home mixed plots with the average of 

 the commercial fertilizer plots either side of the home mixed 

 plots the following results are obtained : 



Formula No. 2, 87 barrels ; Watson's Improved, 87 barrels. 



Formula No. 3, 81 barrels ;Watson's Improved. 88 barrels. 



Formula No. 3 A, 91 barrels ; Watson's Improved, 96 barrels. 



It will be noted that the results on the whole are again lower 

 with home mixed goods than with the commercial fertilizer. 

 The results are not consistent, however, with each other, and 

 no conclusive interpretation of the results is apparent. It is 

 planned to continue the comparisons another season- 



