160 



EXPERIMENT STATION. 



[Jan. 



The individual roots in tliis summer collection showed much 

 wider variations than the late fall series, which is attributed to 

 the difficulty of judging average plants by the young shoots, and 

 it is probable that the different plots are not as fairly repre- 

 sented as in the fall collections. 



Effect of Fektilizeks on the Fertilizing Constituents 



OF THE Roots. 

 The fertilizing constituents of asparagus roots were found by 

 Rousseaux and Brioux ^ to be as follows : — 



Manure only 

 (Per Cent.). 



Manure and 

 Choniicala 

 (Per Cent.). 



Dry matter, 

 Ash, . 

 Nitrogen, 

 Phosphoric acid. 

 Potash, 

 Lime, . 

 Magnesia, . 

 Sulfuric acid. 



28.26 



6.90 



1.20 



.50 



1.23 



.31 



.04 



.33 



2fi.27 



7.22 



1.73 



.48 



1.57 



.41 



.05 



.36 



Wichers and Tollens ^ reporte<l the following results on the 

 principal fertilizing constituents : — 



Roots 

 (Per Cent.). 



Crown 

 (Per Cent.). 



Moisture, 



Nitrogen, 



Phosphoric acid (P:>05), 



Potash (KoO), . 



3.86 



1.64 



.54 



1.60 



The general average of fertilizing constituents calculated 

 from the various analyses made at this experiment station is as 

 follows : — 



• hoc. cit., p. 312. 

 2 hoc. cit., p. 109. 



