BULLETIN No. 167. 



FIELD EXPERIMENTS IN 1906-8, 



Chas. D. Woods and J. M. Bartlett. 



In addition to the field experiments conducted by the Plant 

 Pathologists of the Station and reported in bulletins 149 and 

 164 a number of cooperative field experiments were planned and 

 carried out by the writers during the years 1906-8. Some of 

 these experiments, notably, test of varieties of potatoes for 

 blight resistance and yield and a modified ridge versus the high 

 ridge culture ordinarily practiced in Aroostook County are to be 

 continued. 



Experiments With Fertilizers on Potatoes in 1906. 



The object of this experiment was to compare home mixed 

 fertilizers with ready mixed goods using the same amount of 

 plant food as nearly as possible in each case. 



The field selected for the purpose was on the "Kenney Farm," 

 so called, about 3 miles from Houlton village and planted this 

 season by Mr. W. S. Blake through whose courtesy the Station 

 was allowed to make its experiment. The field was an old one 

 and had been cultivated for many years and this season was 

 planted to potatoes for the second crop since the land was in 

 grass, the piece yielding about 100 barrels to the acre in 1905. 

 The land was high, naturally well drained and the soil was 

 somewhat finer than most of the potato lands, quite free from 

 stone and apparently sufficiently uniform to make the different 

 plots favorable for comparing different kinds of fertilizers. 

 Fourteen acres were used in all for the experiment, being divided 

 into plots of one acre each. 



For a mixed fertilizer Watson's High Grade Potato Fertilizer 

 was used and die home mixed goods were made according to the 

 following formulas. 



