162 



EXPERIMENT STATION. 



[Jan. 



Effect of Muriate of Potash on Ash Constituents. 



Roots of 1910. 



The presence or absence of pliosplioric acid in the top-dressing 

 produces little or no perceptible effect on the ash and ash con- 

 stituents, even the phosphoric acid percentages being remark- 

 ably uniform throughout the whole series of tests. The absence 

 of nitrate of soda and muriate of potash reduces the percentages 

 of ash, and in the former case the soda and sulfuric acid are 

 reduced also, while in the latter case it is the potash which is 

 reduced. Lime and magnesia are apparently unaifected by the 

 variations in top-dressings. 



Effect of Fertilizees on the ISTitrocien and I^itrogenous 

 Reserve Material. 

 The nitrogenous matter stored in the roots was definitely 

 affected by the different quantities of nitrate of soda applied, and 

 also by its season of application ; but the superphosphate and 

 muriate of potash had no effect on the percentage of this element. 



Effect of Nitrate of Soda on Nitrogen. 



Plot 

 Number. 



1908 



(Per Cent.). 



1910 



(Per Cent.). 



No nitrate. 

 Low nitrate. 

 Medium nitrate. 

 High nitrate, 



1,40 

 31,32,33 

 34, 35, 30 

 37, 38, 39 



1.28 

 1,69 

 2.10 

 2.10 



1.53 

 1.82 

 1.97 

 2.05 



