Barn and Field Experiments in 1917. 



39 



Growing Potatoes with Application of Different forms of 

 Nitrogen Yield of Potatoes Per Acre. 



Merchantable 



Culls 



Plot No. 





Treatment 



Cut, 



Bbls. 



Bus. 



Cwt. 



BblB. 



Bus. 



765 



770 



Average 



% 

 % 



% 

 % 



y 3 

 y 3 

 % 

 % 



Vs 



% 



% 



Vs 



Vs 

 Vs 

 Vs 

 Vs 



Nitrate of Soda 

 Nitrate of Soda 



Sulph. of Amnion. 

 Sulph. of Ammon. 



Nit. of Soda \ 

 Sulph. Ammon. J 

 Nit. of Soda j 

 Sulph. Ammon. ) 



Nit. of Soda 1 

 Organic J 

 Nit. of Soda | _ 

 Organic j 



Sulph. Ammon. ? 

 Organic 5 

 Sulph. Ammon. 1 

 Organic \ 



143.9 



135.9 

 139.9 



87.2 

 82.4 

 84.8 



239.8 

 226.6 

 233.2 



4.5 

 2.5 

 3.5 



2.7 

 1.5 

 2.1 



7.4 

 4.1 

 5.7 



766 

 771 



Average 



140.3 

 143.2 

 141.7 



85.0 

 86.8 

 85.9 



233.7 

 238.7 

 236.2 



4.6 

 3.5 

 4.5 



2.8 

 2.1 

 2.5 



7.7 

 5.8 

 6.8 



767 

 772 



Average 



134.5 



145.0 

 144.8 



81.5 



87.9 

 84.7 



224.1 



241.7 

 241.3 



3.1 



2.8 

 2.9 



1.9 



1.7 

 1.8 



5.2 



4.7 

 4.9 



768 

 773 



Average 



132.0 



143.7 

 137.9 



80.0 



87.1 

 83.6 



220.0 



i 239.5 



229.8 



3.5 



3.1 

 3.3 



2.1 



1.9 



2.0 



5.8 



5.2 

 5.5 



769 

 774 



Average 



136.6 



159.0 

 143.3 



82.8 



90.9 

 86.8 



227.7 



250.0 

 238.9 



3.7 



3.0 

 3.4 



2.3 



1.8 

 2.1 



6.3 



5.0 

 5.7 



Growing Potatoes with Application of Different forms of 



Nitrogen in 1914-1913-1916 and 1917. Yield 



in Hundredweight Per Acre. 



Average 



% Nitrate of Soda 



% Sulphat? of Ammonia 



Vs Nit. Soda % Sulph. Ammon. 



Vs. Nit. Soda % Organic 



J 3 Sulph. Ammon. % Organic 



198 



186 



231 



14'J 



189 



182 



193 



231 



142 



188 



191 



196 



226 



145 



190 



198 



183 



231 



138 



188 



182 



18"J 



236 



143 



185 



From the results of these trials it appears that there is 

 little choice in the form that nitrogen is used on potatoes in 

 Aroostook County and that the supposition made in the first 

 paragraph of this report has not held true at Aroostook Farm 

 in the past 4 years. The experiment is to be continued at least 

 one more year. 



